(European
network HPRI-CT-1999-40012)
Scientific
and Technical Report (1.period)
Reporting
period : 1.2.2000 -
31.1.2001
Scientific and Technical Report
covering the 1. period (1.2.2000 – 31.1.2001)
of the
Infrastructure co-operation network
LEIF
Low Energy Ion Beam Facilities
HPRI-CT-1999-40012
1 Foreword 3
2
LEIF-projects
4
2.1
Information 4
2.2
Quality
and management 5
2.3
On-line
access 6
2.4
Common
tools and multi-coincidence detectors 7
2.5
Ion
beam production 8
2.6
Beam
control and deceleration 9
3
Conferences,
workshops, working visits 11
3.1
General
meetings 11
3.2
Project
meetings 11
3.3
Working
visits 12
4
Further
activities 15
4.1
Collaborations 15
4.2
Young
scientist forum 17
5
Outlook
2001/2002 17
6
Appendix
(documentation) 18
6.1
List
of meeting participants 18
6.2
Participating
institutions 20
6.3
LEIF-related
publications 23
6.4
Milestones
and deliverables 35
The
commencement date of this network has been fixed to
the 1st of February 2000,
thus this report covers the period from 1.2.2000 to 31.1.2001. As the financial
support from the European Commission arrived in early May, the main activities
in the network were delayed and started in May
only.
The
objectives on which we have agreed in the model contract concern the
co-ordination of 8 low-energy ion beam facilities, the improvement of the
relationship with the user community, the increase of the infrastructure
performances, as well as the initiation of collaborations between research
groups from different European countries. As a long-term goal this network
shall prepare the platform for a virtual European Low Energy Ion Beam Facility,
which guarantees a close link between different national institutions and which
is organised by a common management concerning the research and the relation
with the user community.
In order to arrive at this
point the network has been organised in the framework of six different
LEIF-projects :
Information policy,
Management and quality,
On-line access,
Common tools and multi-coincidence
detectors,
Ion beam production,
Beam control and deceleration,
by using the following tools:
work and exchange visits,
project
meetings,
conferences,
circulating
inquiries,
LEIF-presentations
and
initiations
of collaborations.
During the first year it was
of particular importance to widly publicise the existence
and the ideas of the network LEIF.
Furthermore, it was the objective to
create a basis in the different LEIF-projects as a starting point for future
activities. In order to achieve these
aims several meetings have been organised. Particularly during the first annual
meeting, where external users of the infrastructures and experts in the field
of ion collisions have been invited, the LEIF-spirit has been developed concerning collaborations between
different groups, the participation of users in infrastructure decisions, the
need for quality in our research and a common sense for developing a low-energy ion community. In addition by direct
contacting people or by presenting the LEIF-network on posters at various
conferences, well-established in the field of ion-matter collisions, the
information has been spread out widely and efficiently.
As coordinator of this
network I would like to thank all persons who participated in and contributed
to this work and also the European Commission that
made it possible for us to finance and to develop this project.
Grenoble, March 2001
Prof.
Dr. B.A. Huber
2
LEIF-projects
2.1
Information
policy
Person
in charge: Prof. Dr. T.J.M. Zouros, FRT
(Institute of Electronic
Structure and Laser, Foundation for Research and Technology – Hellas and
Physics Dept. University of Crete, Heraklion, Crete)
The main objective of this
project concerns the design and the actualisation of a LEIF-homepage and
associated URL. Concerning this task the following points have been
implemented:
At the same time a more
permanent address (URL) was sought with the more direct address http://www.leif-network.org.
The new URL was actually not
the desired one (),
which unfortunately was already taken.
·
A job announcements entry under general information on
the homepage announcing new jobs that might be of interest to primarily young
researchers within the LEIF network. Since its creation 5 jobs have been
advertised with links to the various institutions offering the positions.
·
A central e-mail button readily available from
anywhere inside the LEIF web pages through which messages can be selectively
sent either to a particular principal contractor of LEIF or to all contractors
simultaneously.
·
A URL link to each participating LEIF member’s
laboratory.
·
Special links for each meeting hosted by LEIF that
both announce the meeting program, but also at its completion give a summary of
what happened at the meeting and also present some of the talks themselves for
which an electronic form (Word, Power-Point) was readily available.
2.2
Quality
and management
(Commissariat à l’Energie Atomique, DSM / DRFMC / GIM,
CEA-Grenoble,
Grenoble, France)
Project 2 can be divided
into two major parts: quality assurance and defining rules for beam-time
distribution on a European scale.
Quality
assurance:
A round table held during
the kick-off meeting in Grenoble, in which the general roadmap for quality
assurance was outlined, revealed, that it is important to explain the concept
and lingo of quality assurance to the network members. Several participants
remarked that a quality norm tailored for (mainly commercial) production and
service processes cannot be used in basic
research, where quite often the final goal as well as the methods applied have
to be changed during the project.
A core group was formed in
order to discuss the subject in more detail and to arrive at a concept for
incorporating quality into LEIF. This group consists of Bernd Huber, Henning
Lebius (both CEA-Grenoble, contractor 1), Örjan Skeppstedt (MSL Stockholm,
contractor 5) and Theo Zouros (FORTH Crete, contractor 12). Taking advantage of
the fact that within CEA a ‘quality-club’ exists, which devised a frame work
for quality assurance in basic research, a quality-meeting was organised to
which we invited Rene Duc, a member of the aforementioned group, as well as two
consultants in quality programs, Marc Reynier of Bertin Technologies and Jean
Paul Imbert of AFNOR Lyon. This meeting was especially fruitful, as it became
evident that there are indeed quality programs which can be used in basic
research, taking into account the special character of research.
In order to introduce these
ideas to a larger community, Rene Duc gave an introductory talk during the
annual meeting in Potsdam. This talk provoked a rather intense discussion, a good sign that the message was
delivered. In order to further advance the project a second quality meeting was
organised in Grenoble in December 2000, which was attended by Bernd Huber,
Henning Lebius (CEA-Grenoble) and Rene
Duc and Arnaud Muret (‘club-qualité’, CEA-Saclay). It was the task to apply the quality concept to the individual
LEIF-projects by defining the needs and objectives, the appropriate methods and
the criteria for success. The results of this meeting have been communicated to
the persons in charge of the different projects and are actually under
consideration. It is the final goal to establish a quality referential for
LEIF.
The principal goal of the
network is to prepare a ‘distributed low-energy ion beam facility’, consisting
of all important corresponding European installations. We started evaluating
the possibility of a European beam-time committee (EBTC). At the moment,
several installations are obliged by their national authorities to conduct
local beam-time committees. This may change in the future, especially if the
EBTC gains the confidence of the national authorities involved and if more
detailed proposals are made by the European Commision
concerning the virtual European facilities.
After several discussions
with the members of the network, especially on the last annual meeting in
Potsdam, a first draft of the agenda for the EBTC was drafted. This is
currently under consideration by the network co-ordinator.
Due to these difficulties a centralised beam time distribution has not been performed in the first period. It is planned, in a 2-year phase of transition, to probe different scenarios for distributung beam time to external users. During the 2. Annual meeting in Heraklion an oral presentation of the user projects demanding beam time will be integrated into the program and a committee, consisting actually of different LEIF-members, will evaluate the demand and may give its recommendations.
2.3
On-line
access
Person in charge:
Prof. Dr. HP. Winter, TUW
(Institut für Allgemeine Physik, TU Wien, Vienna, Austria)
Within this project it is planned to organise and provide online access to all network participants at experimental facilities of the involved institutions. This will both save travelling costs and enhance the efficiency for the use of the experimental facilities. In order to achieve this goal, the project will be organised in the following four consecutive steps.
(a) Critical comparison of
data acquisition and control methods currently used at the different
experimental facilities.
(b) Standardisation of data
acquisition methods by basing them on the “Labview”
program system.
(c) Set-up of an
Internet-based transfer system for quick data exchange between partner
institutions and for support of co-operative data evaluation.
(d) Introduction of an
Internet-based scheme for remote participation in particular experiments
(mandatory).
Regarding step (a), an inquiry has been sent to all
experimental groups and the results have been presented at the 1. Annual LEIF
network meeting in Berlin (October 2000). Based on the results of this inquiry
it has been decided to organise a workshop on the application of “Labview” prior to the 2nd Annual LEIF network meeting in Heraklion/Crete (September 2001).
Apart from this no specific meetings have taken place so far.
2.4 Common tools and multi-coincidence
detectors
Person in charge: Prof. Dr. H.O. Lutz, UBI
(Institut
für Physik, Universität Bielefeld, Bielefeld, Germany)
·
In modern collision experiments it is often necessary
to extract the full information about a reaction which involves more than one
or two products. Therefore, in such situations one has to deal with several
particles which arrive at the detection system within a short time period.
Several such "multi-hit" schemes exist, for example
-
crossed wire detectors,
-
video camera-supported systems,
-
delay line detectors,
-
resistive anode and backgammon-type structures,
and others, where the idea
has often been taken from nuclear physics techniques. It has, therefore, been
agreed on establishing a compilation of the various systems in use within LEIF
or by researchers outside the network.
·
An enquête has been conducted among the LEIF members,
summarising the available detectors in the network and the requirements for
future studies.
·
An extended test of a crossed-wire particle detector
has been performed at the CEA-HCI-facility in Grenoble. This test was quite
successful; it stimulated a typical user-configuration and experimental
practice, and demonstrated that a large volume of data can be obtained in a
reasonable time. For further work, however, an improvement of certain detector
parameters (e. g. spatial resolution) have shown to be desirable. Pertinent development work is going on.
·
A homepage for detector structures and application has
been installed in the Bielefeld server. The address is
This homepage contains a
collection of detector types as used in the network and, in parts, also other
systems used by other groups and published in the literature, with
corresponding references. It provides links to the LEIF homepage (), to
the homepages of the network members and other links of interest for detector
users and developers. This page is also accesible via the LEIF-project webpage.
·
An inquiry is presently performed to plan an upcoming
workshop on detectors, which will be held as a satellite to the 2nd
annual meeting in Heraklion.
·
During the Potsdam meeting, the network members
discussed if the design of a multi-purpose chamber would be desirable. We
agreed that at present such a chamber would not be flexible enough, more
exactly, the price to capability ratio would be too high. We will study further
development, though.
2.5 Ion beam production
Person in charge: Prof. Dr. P. Hvelplund, UAA
(Institute for Physics and Astronomy, Aarhus
University, Aarhus, Denmark)
At
the kick-off meeting in Grenoble in May 2000, representatives from the involved
institutions reported on the present status of ion-beam production in their
respective laboratories. It was decided at this meeting to collect information
about existing ion sources within the network. This information is given in
Table I. It should be noted that the electron cyclotron resonance ion source
(ECR) is by far the most used ion source within the network. Therefore, further
developments of this type of ion source have high priority among other source
developments. The other ion sources listed in Table I will most probably not
reach the same popularity as the ECR source, but several laboratories have
shown an interest in the development of one or more of these ion sources for
special purposes.
An overview of most of the
existing ion sources can be found in the following 3 books:
1.
Handbook of ion sources. Bernard Wolf (Ed.), CRC press
2.
Mass spectrometry. Hoffmann, Charrette and Stroobant, John Wiley and Sons
3.
Clusters of Atoms and Molecules I.
Haberland (Ed.), Springer Verlag
At the annual LEIF-network
meeting in Potsdam (October 2000) Dr. G. Zschornack gave a talk on the Dresden
Electron Beam Ion Trap (DEBIT), and several posters described the ion sources
in use within LEIF. Preben Hvelplund reported on the results of an inquiry
about ion sources (see Table I).
Two workshops on ‘ion beam
production’ are taking place in the spring of 2001. In Giessen, an ECR workshop
took place on March 9-11. Here ECR users from LEIF and invited specialists discussed future
developments of ECR ion sources. In Aarhus, an ion source workshop will take
place from May 17-20. Here we will discuss several ion sources which might be
of general interest to the LEIF infrastructure and users. Five outside experts
are invited to talk about EBIS sources, trap sources, electrospray sources,
micro plasma sources or to give a general overview of ion sources. Members of
the LEIF collaboration will report on cluster ion sources, sputter ion sources,
electron impact ion sources, plasma ion sources and possibly other ion sources.
A specific aspect will be devoted to methods which can be applied to control or
to reduce the internal temperature of complex molecular ions. A report on the
outcome of the Giessen meeting about ECR sources will also be given.
The intention of these two
ion source workshops is to increase the level of knowledge about ion beam
production for small accelerators and to initiate common ion source development
programmes which involve two or more LEIF laboratories.
In order to compare the performances of different ion
sources on an objective basis, it has been agreed to perform future ion current
measurements with a standardised Faradaycup. This standard system which is
under construction in several laboratories integrates two diaphragms with a
diameter of 2 mm at a distance of 50 mm. The beam quality defined by this
system corresponds to the ‘typical’ requirement of many collision experiments
at low energies.
|
|
HMI |
TUW |
CEA |
QUB |
JLU |
KVI |
MSL |
UAA |
LFU |
|
14.5 GHz ECR |
X |
X |
X |
|
X |
X |
X |
|
|
|
10 GHz ECR |
|
|
|
X |
X |
|
|
|
|
|
5 GHz ECR |
|
X |
|
X |
X |
|
|
|
|
|
2.45 GHz ECR |
|
X |
|
|
X |
|
|
|
|
|
Sputter IS |
|
|
|
X |
|
|
|
X |
|
|
EBIS |
|
|
|
|
|
|
X |
X |
|
|
Plasma IS |
|
X |
|
|
|
|
|
X |
|
|
Electrospray IS |
|
|
|
|
|
|
|
X |
|
|
Nier IS |
|
X |
|
|
|
|
|
X |
X |
|
Cluster source |
|
|
X |
|
|
|
|
|
X |
|
High-pressure Discharge source |
|
|
|
|
|
|
|
|
X |
2.6 Beam control and deceleration
Person
in charge: Prof. Dr. R. Morgenstern, KVI
(Kernversneller
Institute, Groningen, Netherlands)
An
inquiry has been performed, the main results of which are given in the following:
'Visualize'
ion beams:
So far most groups use Faraday cups to measure the beam intensities at
various beamline positions.
In
Aarhus a whole arsenal of beam-diagnostics tools is applied: Faraday cups and
beam-scanners (DANFYSIK) are in operation. For specific beams (especially Mg+
ions in the storage ring ELISA) lasers are used to visualize the spatial
beam profile as well as the velocity distribution by observing the
fluorescence, when the laser is scanned across a resonance transition. For the
beam injection into the ring a 'viewer' is used, consisting of a fluorescent
plate together with a camera.
In
Grenoble an oscillating fork was used for some time. However it was rather
error-prone and therefore taken out of service some time ago.
Furthermore, a new technique
has been developed by the Paris group to obtain images of highly charged ion
beams using CCD cameras. These techniques are now used at the AIM in Grenoble
and at LIMBE in Caen.
Obtain
low-energy ion beams:
In
Groningen an octopole system was constructed and installed which allows to
decelerate ions electrostatically down to kinetic energies of a few eV/amu and
nevertheless confine the ion beam to a diameter of roughly 2mm by applying a
radio-frequency voltage to the octopole. Ion-trajectory calculations have been
performed in which the space charge of the ion beam is taken into account, and
good agreement with experimental results has been obtained.
Grenoble is preparing a new
beamline (to be installed at GANIL in 2002) for low-energy ions (<
100eV/charge), working with electrostatic zoom lenses.
In Aarhus, low-energy beams
are produced by collecting ions from the primary source in a Paul trap with He
as a buffer gas. Energies as low as ~50
eV can be obtained.
The Paris team has developed
in Grenoble and in Caen a different technique to decelerate highly charged ion
beams delivered by ECR-sources. In collaboration with H. Lebius in Grenoble,
the team has successfully decelerated ion beams down to zero energy with a
resolution of 1 eV on target surfaces.
Obtain
self-controlled ion beams:
So far none of the
laboratories has 'self-controlled' beams, i.e. ‘intelligent’ diagnostic systems
which reoptimise the beam permanently. As a first step into the good direction
it has been agreed within the network that in the future preferably LabView
should be used for steering the various beam-control units. At several
laboratories a start has been made to implement this, e.g. in Belfast, Giessen
and in Groningen. A hands-on LabView seminar will be given during the second
annual LEIF meeting in Heraklion (September 2001).
Obtain
pure beams (isotopically and electronically):
Regarding different isotopes
most laboratories use isotopically pure gases for the ion production and
moreover the deflection magnets mostly have sufficient resolution to warrant
'pure' beams. Regarding electronically 'pure' beams the situation is more
complicated. Work on metastable
enriched and/or state prepared beams is in progress in Grenoble, Belfast and in
Vienna.
3 Conferences, workshops and working visits
3.1
General meetings
During the first period of the network two general meetings took place. The first one, the so-called kick-off meeting, was organised in Grenoble end of May 2000 with the aim to clarify the objectives of this network and to start the practical work in different projects. Therefore, it was an internal LEIF-meeting, in which 24 persons of the network participated. The aim of the annual meeting, held in Potsdam in October 2000, was to integrate external users into the network and to make them familiar with the work going on in this project. Furthermore, possible future aspects of applying highly charged ions in different scientific fields were discussed by different experts. The number of participants had increased to 60 scientists.
More details on both meetings, the corresponding
programs and the outcome of the discussions are summarised in two reports
(Report on the Kick-off Meeting; Report on the 1. Annual LEIF-network meeting)
which have been sent to the European Commission and which are available on the
LEIF-homepage.
3.2
Project meetings
In addition to the general meetings, where all principal contractors have been involved, smaller meetings or ateliers have been organised devoted to individual LEIF-projects. This type of meeting has been organised for projects 1 and 2 in the first period, it will be organised within the next months for project 5 and as satellites to the 2nd Annual meeting for projects 3, 4 and 6 in September 2001.
1.
Concerning the project 1 (information) a small meeting
took place after the Kick-off meeting (T. Zouros, H. Lebius, B.A. Huber), where
different possibilities for constructing a LEIF-homepage as well as the items
which should be communicated have been discussed.
2.
A meeting ‘Quality’ (project 2) has been organised in
July (7.7.2000) in Grenoble,
bringing together several
members of the LEIF-network (Ö. Skeppstedt (Stockholm), T. Zouros (Heraklion),
H. Lebius, B. Huber, R. Duc (CEA)) with the representatives of two professional
enterprises (Bertin Technologies, AFNOR), which are concerned with the
application of quality standards (see summary-report on the web-page). The
general outcome of this meeting was the conclusion, that it is not realistic to
apply existing quality standards (ISO-9001 norms, etc.) to fundamental research
and to our network. The most promising procedure for introducing quality in our
domain is based on our definition of
our needs, of the methods we want to
apply to fulfil these needs and of the quality criteria which we propose for
the control of the success and the effectiveness of the proposed methods. This
is also in the spirit of the new ISO 9000:2000 norm.
3.
A second ‘Quality’ meeting was organised in December
(7.12.2000) in Grenoble. As in the field of basic research a working group of
CEA/DSM (R. Duc, A. Muret) has already
established a referential of quality, we have initiated a close
collaboration with this group in order
to create a quality referential for the network LEIF. With the aid of some
concrete examples of the LEIF-programme the different steps of a referential
have been defined and they should serve as guideline for the whole network. A
summary report of the meeting is documented on the web-page.
4.
The application of the software-package Labview
(project 3) for experimental control and data handling and transfer will be
practiced in a 2-day Labview hands-on seminar, to be held just before the 2nd
Annual meeting.
5.
A workshop on "Detectors" (project 4) will
be organised as a satellite to the annual meeting in Heraklion in September
2001. It is the aim to give an actual overview on modern particle detectors, to
define the needs of the user community and to initiate collaborations between
users and (or) infrastructures.
6.
During March (9.-10.3.2001) an ECR-workshop (project
5) has been organised in Giessen in order to compare the actual performances of
ion sources producing ions in very high charge states. In order to allow the
infrastructures to improve their ion sources with a ‘low budget’, the essential
criteria for constructing an efficient ion source have been recalled in invited
talks.
7.
A complementary meeting (project 5) is planned to take
place the 18th to 20th of May 2001 in Aarhus. At this
occasion sources for the production of complex ions (molecules, clusters, ...)
and possibilities to cool down their internal degrees of freedom and to control
the vibrational temperature will be discussed.
8.
During a second satellite of the Heraklion
meeting the different techniques of creating
slow ion beams will be discussed (project 6). On the one hand different systems
to decelerate ions to very low energies (eV-range) and to guide them towards
the experiments will be presented and on the other hand possible methods to
introduce them into ion traps and to control their temperature will be
considered.
3.3
Working visits
Aside from various contacts
at workshops and conferences a larger number of working visits took place:
N. Stolterfoht (HMI)
to Caen (F) April 1-5, 2000 (project 5)
Purpose: ECR-tests and exchange
of information with the ECR-group at GANIL.
Results: Learning to
incorporate new magnets and coils into the ECR-source.
Back
in Berlin: Update of the ECR source with new magnets and coils.
Perspectives: Enhancement
of high charge states for heavy ions (eg. Ar, Xe).
M. Beuve (HMI) to
Caen (F) September 20-23, 2000
(projects 3 and 5)
Purpose: Exchange of
information with the ECR-group at GANIL.
Results: Information
about beam control via the LabView Program
Perspectives: Efficient
scanning of ions and charge states from the ECR source.
N. Stolterfoht (HMI) to Caen (F)
October 25-31, 2000 (project 5)
Purpose: Tests and exchange
of information with the ECR-group at GANIL.
Results: Learning to
efficiently operate the updated ECR-source.
Improvement
in stability of the gas handling system and beam current.
Perspectives: Enhancement
of high charge states for heavy ions (eg. Ar, Xe).
N. Stolterfoht (HMI)
to Belfast (QUB, UK) December 13-17,
2000 (project 4)
Purpose: Exchange of
information on ECR measurements.
Results: Setting up a
collaboration about electron emission from surfaces
Perspectives: Technical
progress in measuring low-energy electrons (below 10 eV)
R.
Trassl (JLU) to Belfast (QUB, UK), 14.4.-21.4.00 (project 5)
Purpose: Experimental tests and discussions on
further improvements of the jointly developed all-permanent magnet 10 GHz-ECR
ion source GIEBEL
(GIESSEN-BELFAST)
E.
Salzborn (JLU) to Paris (ERI, F), 24.5.00 (project 5)
Purpose: Discussions on ECR-ion sources and possible
experiments of Prof.Briand at the JLU-Giessen LEIF-facility
Results:
Further improvements on beam control (Project 6) are needed as
prerequisite
A. Müller (JLU) to Heraklion
(FRT, Gr), 22.11.-26.11.00 (project 5)
Purpose:
Discussions on ECR-ion sources and the feasibility of the GIEBEL
–all-permanent magnet 10 GHz ECR for implementation in the lab in Heraklion
Results: Optimal lab-upgrade provided funds are
available
R. Trassl (JLU) to Belfast
(QUB, UK), 1.12.-8.12.00 (project 5)
Purpose: Further experimental tests on the joint
GIEBEL-ECR-ion source
R Hoekstra (KVI) to Belfast (QUB, UK), 1 week- October 2000 (project 6)
Purpose: Discussion of
collaborative possibilities on low energy ion deceleration
techniques
P. Varga (TUW) to Belfast (QUB, UK), 1 week – March 2000 (project 6)
Purpose: Consultation on
techniques for low-energy ion-surface interaction studies
S. Matt (LFU) to Groningen (KVI, N), July 2000
(project 5)
O. Hadjar (KVI) to Innsbruck (JLU, A), January 2001
(project 5)
Purpose:
these visits were intended to establish a closer collaboration between
Innsbruck and Groningen, in order to learn from each other the techniques for
producing beams of large (bio)-molecules and to perform experiments involving such
beams. The group of Innsbruck is interested in using the ion-beam facilities in
Groningen for fragmentation experiments.
Perspectives: the common
effort may lead to the conception of an efficient biomolecular
ion source.
P. Scheier (LFU) to Giessen
(JLU, D), 1 week - June 2000 (project 5)
Purpose:
The aim of this visit was to analyze jointly data on ECR ion sources concerning
the production of singly- and multiply-charged fullerene ions and hydrocarbon
ions. This first visit has lead to further joint work on the use of ECR sources
for the production of molecular and cluster ions. In addition this visit will
also lead to the transfer of ECR ion source technology from Giessen to
Innsbruck, thus allowing us to compare effectively the use of an electron-impact
ions source (Nier source) with a discharge ion source (Colutron) and with an
ECR ion source.
H. O. Lutz, U. Werner, C. Haumann (UBI) to Grenoble,
20.-24.5.2000 (project 4)
Purpose: Discussion of detector designs and
preparation of a planned detector test
beam time;
C. Haumann, B. Siegmann, U. Werner(UBI) to Grenoble
(CEA, F), 4.-26.09.2000 (project 4)
Purpose: beam time for
testing of a multi-coincidence detector by exploding molecules
(dead time, efficiency)
H. Stöckl (TUW) to Grenoble (CEA, F), 20.-23.5. and 14.6 – 31.7. 2000 (project 3, 4)
Purpose:
The detection of slow heavy particles (for example clusters) is difficult as
kinetic electron emission becomes inefficient. It was the aim of this vist to
clarify these problems and to measure the cluster-ion induced electron emission
from gold surfaces in dependence on the
cluster velocity, its size and its charge state. Furthermore, a data transfer
and a remote analysis of data has been exercised.
E. Galutschek (TUW) to Giessen (JLU, D), 17.– 23. 9.
2000 (project 5)
Purpose:
Discussions and transfer of know-how concerning the construction of the 14.5
GHz ECR-ion source SOPHIE
4. Further activities
4.1 Collaborations
Many of the actual atomic
collision experiments have obtained such a degree of sophistication, such a
volume and complexity that a common effort of different groups is required to
advance in collision research. In order to overcome time- and money consuming
problems and to avoid expensive parallel studies, the network LEIF strongly favours
the initiation of collaborations between infrastructures and users. The
following list gives an overview on existing collaborations between different
groups.
Berlin- Belfast:
The Berlin group has set up a collaboration with the LEIF partner at the university of Belfast on detectors capable to reliably measure electrons at low energies below about 10 eV. These electrons are difficult to handle since small disturbances such as residual electric and magnetic fields are changing their trajectories through the detector. Thus, the probability for loosing slow electrons may be significantly enhanced. A joint work is planned to devote specific effort on reducing effects affecting the detection efficiency of low-energy electrons. To achieve this goal both the detectors and the target region would require particular attention and treatment. The Berlin group has many years experience in surface treatment and the Belfast group has extensive know-how in low-energy particle detection. Thus the combined effort in this field is advantageous for both sides.
Berlin-Vienna:
There is an ongoing collaboration of the Berlin group with the LEIF
partner in Vienna about potential sputtering of insulators by slow highly
charged ions. The Vienna group has developed an efficient apparatus to detect
sputtered particles by means of the microbalance method. The experiments with
ions of high charge state (e.g. Xe27+) have been performed at the Berlin ECR source.
Vienna-Berlin:
The formation of individual nanodefects on graphite
(HOPG) and various insulator monocrystalline surfaces (e.g., LiF, SiO2,
Al2O3, mica) due to impact of slow HCI is studied on the
atomic scale by means of AFM (atomic force microscopy) and STM (scanning
tunneling microscopy) in UHV. Preliminary investigations involving untreated
surfaces and surfaces irradiated by ~ keV singly charged ions have certified
the working of AFM for such purposes both in contact and non-contact modes
providing near-to atomic resolution. Now an UHV transfer station has been built
with which samples can be irradiated at different low-ion beam facilities and
put to investigation into the AFM/STM setup.
Giessen – Belfast:
LEIF
has helped very much to intensify and extend the fruitful Giessen-Belfast
collaboration (UGIE.SZ – UBELF.PAP) on all-permanent magnet ECR-ion sources
which resulted in the design and construction of the compact and powerful 10
GHz GIEBEL-ECR ion source. The Giessen ion-ion crossed-beams LEIF facility is
now equipped with this ECR ion source in both beam lines, which resulted in a
major upgrade of this user-facility.
Giessen – Innsbruck:
LEIF
has initiated an extremely fruitful Giessen-Innsbruck collaboration (UGIE.SZ
–UINN.IIP) on collision experiments involving fullerene ions. Employing the
Giessen electron-ion crossed-beams LEIF-facility, we have studied in joint
experiments with Prof.P.Scheier from the Innsbruck team (UINN.IIP) the
multiple-ionization and fragmentation of negatively-charged fullerene ions by
electron impact.
Giessen – Vienna:
LEIF
has initiated a close Giessen-Vienna collaboration on the development of a
state-of-the-art 14.5 GHz all-permanent magnet ECR ion source. The
computer-based design of the magnetic field configuration was successfully
accomplished yielding bright perspectives for a novel and most powerful ECR ion
source.
The all-permanent magnet ECR ion source (acronym SOPHIE for SOurce for Production of
Highly charged Ions via Ecr) with
tunable microwave frequency generator (12.75 – 14.5 GHz) is currently
manufactured and will be set into operation approximately by mid of 2001, after
which elaborate optimization studies by way of the achievable HCI currents will
be made.
Groningen
– Osnabrück:
A collaboration has been initiated with the group of
Prof. Rühl from Osnabrück
This group is interested to use the ion beam
facilities in Groningen for cluster fragmentation experiments. They want to
compare fragmentation processes induced by synchrotron radiation on the one
hand, and by (multiply charged) ions on the other hand.
Vienna
– Grenoble:
We study electron emission due to Na cluster ions
impinging on a polycrystalline Au surface at ca. 45o. The Na
clusters are ionized with a pulsed Nd-YAG laser (266 nm) and mass-to-charge
analyzed in a reflectron-type mass spectrometer. Preliminary results indicate a
dependence of the number of emitted electrons on the cluster size.
Innsbruck –
Groningen:
Within the LEIF-network a collaboration with the group of Prof. Morgenstern, Groningen has been initiated concerning the conception of an efficient ion source for large biomolecules.
Innsbruck –
Louvain-la-Neuve:
The collaboration with Prof. Defrance, Louvaine la
Neuve, has for objective to study the interaction of electrons with cations and
anions using various high performance molecular ion sources.
Innsbruck
– Lyon:
Within the
collaboration between Innsbruck and M.
Farizon, Inst.Nucléaire, Lyon, the interaction of high energy ions with neutral
targets and the interaction of protons with (bio-) molecules and (bio-)
molecular ions produced with various ion sources shall be studied.
Bielefeld
- Grenoble
The collaboration concerns on the one hand the test of
multi-coincidence detectors, on the other hand the study of ion/molecule and
ion/fullerene collisions. In the latter case the influence of different
excitation mechanisms (electronic excitation – vibrational excitation) on the
stability and decay of complex systems is studied.
Bielefeld
– Giessen – Groningen:
Further collaborations between Bielefeld and Giessen and Bielefeld and Groningen concerning the interaction of ions with molecules are planned for 2001.
Grenoble
– Aarhus – Stockholm:
In a joint project the interaction of ions with C60
fullerenes and collisions between charged and neutral C60 fullerenes
are studied. The analysis of phenomena like electron transfer, ionisation and
excitation yields information on the electronic response of these large
molecules and on the energy distribution and energetic coupling between
different modes of complex systems.
Paris
– Grenoble – Caen(CIRIL)
The different techniques for decelerating highly
charged ion beams (Ar17+) down to energies close to zero are tested
and corresponding diagnostic tools are developed.
4.1
Young scientist forum
We have created a platform, where young scientists can express their ideas, formulate their needs and discuss actual subjects of science about which they are currently concerned. This is the so-called young scientist forum.
During the annual meeting in Potsdam this group was
inaugurated (see annual report). First initiatives concerned the installation
of an e-group mailing list in order to communicate rapidly among each other and
the preparation of a corresponding webpage linked to the LEIF-webpage.
Furthermore, the forum asked the LEIF-network to improve the exchange
possibilities for students and young scientists for example by a stronger
participation in the working visits to other laboratories and to deliver also
practical formation as for example by offering the Labview course in 2001. The
network will be attentive to these demands.
5
Outlook
2001/2002
In a retroperspective of the first year we can state that within all proposed projects a first important step has been made in the good direction, but there is still a long way to go. A direct consequence of this network is a much closer relation between the different infrastructures and the groups of the principal contractors in general, much closer than before. This becomes clear, when we observe the different working visits and the numerous collaborations which have been initiated or renewed. Such a strong link is an important premise for the creation of a virtual large-scale facility.
In 2001 we have to continue
in this direction. However, a stronger effort has to be developed with respect
to the ‘outside’ users. In this second phase, it is necessary to convince these
groups not only to use the LEIF infrastructures, but also to participate in the
LEIF-projects and developments and to integrate them into scientific
collaborations. In this way a low-energy ion beam community can be established
which efficiently uses existing potentials and installations.
6 Appendix (documentation)
6.1
List of meeting participants
6.1.1 Internal members (36)
H. Lebius CEA-Grenoble
N.
Stolterfoht HMI-Berlin
V. Hoffmann ’’
J.
Bundesmann ’’
U.
Stettner ’’
Roesner ’’
E. Salzborn Univ. Giessen
R. Trassl ’’
H. Bräuning ’’
R.
Morgenstern KVI-Groningen
R.
Hoekstra ’’
T.
Schlathölter ’’
Ö. Skeppstedt MSL Stockholm
H. Cederquist ’’
K.G. Rensfelt ’’
R.W. McCullough QUB Belfast
J. Greenwood ’’
HP.
Winter TU Wien
F.
Aumayr ’’
J. Stöckl ’’
P.
Hvelplund Aarhus
University
S.P. Moeller ’’
H.B. Pedersen ’’
J.P. Briand Université Paris
VI
G. Giardino ’’
S.
Daveau ’’
T.D. Märk Leopold Franzens Universität,
Innsbruck
P. Scheier ’’
S. Matt ’’
H.O. Lutz Universität
Bielefeld
U. Werner ’’
B. Siegmann ’’
I. Küster ’’
T. J.M. Zouros FORTH, Greece
6.1.2 External participants (34)
S. Martin Université Lyon
I
Li Chen ’’
A. Bordenave Montesquieu Université Paul Sabatier, Toulouse
P. Roncin Univ. Paris-Sud,
Orsay Y.
Chesnel Ciril Caen
F. Fremont ’’
J.P. Grandin CIRIL-Caen
A. Cassimi ’’
H. Winter HU Berlin
B.
Sulik ATOMKI,
Debrecen
P. Defrance Univ. Louvain la
Neuve
W.
Heiland Univ.
Osnabrück
G. Zschornack TU-Dresden (Rossendorf)
C. Biedermann MPI - Berlin
A.
Chetioui Paris
VII
U.
Saalmann MPI-Dresden
R.
Schuch Stockholm
University
W. Möller FZ Rossendorf
R. Duc CEA-Saclay
A. Muret ’’
J.
Ullrich Universität
Freiburg
S. Della-Negra IPN-Orsay
D. Schneider Lawrence Livermore
Laboratory (USA)
A.
Landers Western
Michigan University (USA) J.
Tanis ’’
Radtke MPI-Berlin
T. Fuchs ’’
F. Ullmann TU-Dresden
V.P. Ovsyannikov ’’
O. Jagutzki IFK Frankfurt D.
Vernhet GPS, Paris VI F.
Herzog HMI-Berlin
J.P. Imbert AFNOR,
Lyon
M. Reynier bertin
technologies, Aix-en-Provence
6.2 Participating institutions (33)
Austria
Leopold Franzens Universität
Innsbruck
Institut für Ionenphysik
Technikerstr. 25, A-6020 Innsbruck,
Austria
Technische Universität Wien
Institut für Allgemeine Physik
Wiedner Hauptstrasse 8-10, A-1040 Wien,
Austria
Belgium
Université Catholique de Louvain
Déoartement de Physique
Unité FYAM
Chemin de Cyclotron, 2, B-1348 Louvain-la-Neuve,
Belgium
Denmark
Århus Universitet
Institute of Physics and Astronomy
University of Aarhus
DK-8000 Aarhus C, Denmark
AFNOR
Association Française de Normalisation
177, rue Garibaldi, F-69003 Lyon, France
Bertin Technologies
155, rue Louis Armand, F-13791 Aix-en Prevence-Cedex, France
CIRIL
Centre Interdisciplinaire de Recherche Ions Laers
Laboratoire Mixte CEA-CNRS-ISMRA
Rue Claude Bloch, BP 5133, F-14070 Caen
Cedex 05, France
Commisariat à l’Energie Atomique
(CEA)
Direction des Sciences de la Matière
Orme des Merisiers, F-91191 Gif-sur-Yvette,
France
Commisariat à l’Energie Atomique
(CEA)
Département de Recherche Fondamentale sur la Matière Condensée (DRFMC)
Groupe d’Ins Multichargés (GIM)
CEA-Grenoble, 17, rue des Martyrs, F-38054 Grenoble Cedex 9, France
Bâtiment 100
15, rue Georges Clemenceau,
F-91406 Orsay Cedex, France
Université de Paris-Sud
LCAM
F-91405 Orsay, France
Université Pierre et Marie Curie
Paris VI
Equipe de Recherche Ions-Surfaces (ERIS)
Université Pierre et Marie Curie
Tour 12-22, 3ème étage, Case 93
4 place Jussieu, F-75252 Paris
Cedex 05, France
Université Paris 7 et Paris 6
Groupe de Physique de Solides (GPS)
Equipe des Interactions Ions Matière
2 place Jussieu, F-75251 Paris Cedex
05, France
Université Paul Sabatier
Laboratoire CAR-IRSAMC
118 Route de Narbonne, Toulouse,
France
Université Claude Bernard Lyon 1
LASIM
43 Bd du 11 Novembre 1918, 69622 Villeurbanne,
France
Hahn-Meitner Institut Berlin GmbH
Festkörperphysik, Dept. SF4 \ ISL
Glienickerstr.100, D-14109 Berlin,
Germany
Fachbereich Physik
Invalidenstr. 110, D-10115
Berlin, Germany
Max Planck Institut für
Plasmaphysik
Bereich Plasmadiagnostik
Mohrenstr. 41, D-10117 Berlin,
Germany
University of Bielefeld
Fakultät für Physik
Universität Bielefeld
Universitätsstrasse 25, D-33501 Bielefeld,
Germany
Max Planck Institut
für Physik komplexer Systeme
Nöthnitzer Strasse 38, D-01187 Dresden,
Germany
Technische
Universität Dresden
Institute of Ion Physics and Material Research
Forschungszentrum Rossendorf and
Institute of Surface and Microstructural Physics
P.O. Box 510119, D-01314 Dresden,
Germany
Technische Universität Dresden
Institut für Theoretische Physik
Zellescher Weg 17, D-01062 Dresden,
German
Johann Wolgang Goethe-Universität
Frankfurt am Main
Institut für Kernphysik,
August-Euler-Str. 6, D-60486 Frankfurt
/ Main 90, Germany
Universität Freiburg
Fakultät für Physik / Atomphysik I
Hermann Herder Str. 3, D-79104 Freiburg,
Germany
Justus-Liebig-Universität Giessen
Institut für Kernphysik, Fachbereich Physik
Justus-Liebig-Universität
Leihgesterner Weg 217, D-35392 Giessen,
Germany
Universität Osnabrück
Fachbereich Physik
Barbarastr. 7, D-49069 Osnabück
, Germany
Technische Universität Dresden
Institut für Kern- und Teilchenphysik
Atomare Schwerionenphysik
Pratzschitzer Str. 15, D-01796 Pirna,
Germany
Foundation for Research and
Technology - Hellas
Institute of Electronic structure and Laser (IESL)
P.O. Box 1527, GR-711 10 Heraklion,
Greece
Hungarian Academy of Science
Institute of Nuclear Research
H-4001 Debrecen, POB 51 ,
Hungary
Netherlands
Rijksuniversiteit Groningen
Kernfysisch Versneller Institut KVI
Zernikelaan 25, NL-9747 AA Groningen,
Netherlands
Manne Siegbahn laboratory
Frescativägen 24, S-10405 Stockholm,
Sweden
The Queen’s University of Belfast
Atomic and Molecular Physics Research Division
School of Maths and Physics
Belfast BT7 1NN, N. Ireland, United Kingdom
Western Michigan University
Department of Physics
Kalamazoo, Michigan 49008, USA
Lawrence Livermore National Laboratory
N-Div. L-421
P.O.Box 808, Livermore CA
94551, USA
6.3 LEIF-related publications
The
following list demonstrates the scientific activities of the groups
participating directly in the LEIF network and of those groups which are using
LEIF-infrastructures. We have included publications in refereed journals which
appeared in the year 2000 as well as those which have been accepted and which
are currently in print. The list is not expected to be complete.
Curve-crossing analysis for potential sputtering
of insulators.
L. Wirtz, G. Hayderer, C. Lemell, J. Burgdörfer, L. Hägg,
C.O. Reinhold,
P. Varga, HP. Winter and F. Aumayr
Surface Sci., 451,
197-202 (2000)
Observation of a threshold in potential
sputtering of LiF surfaces.
G. Hayderer, C. Lemell, L. Wirtz, M. Schmid, J. Burgdörfer,
P. Varga, HP. Winter
and F. Aumayr
Nucl. Instrum. Meth. Phys. Res. B, 164-165, 517-521 (2000)
Coincidence measurements of highly charged ions
interacting with a clean Au(111) surface.
C. Lemell, J. Stöckl, J. Burgdörfer, G. Betz, HP. Winter and
F. Aumayr
Phys. Rev. A, 61,
012902, 1-7 (2000)
Unexpected Behaviour of the Stopping of Slow
Ions in Ionic Crystals.
J.I. Juaristi,
C. Auth, H. Winter, A. Arnau, K. Eder, D. Semrad, F. Aumayr, P. Bauer, and P.M.
Echenique
Phys. Rev. Lett., 84,
2124-2127 (2000)
Coincidence measurements of highly charged ions
interacting with surfaces.
C. Lemell, J.
Stöckl, J. Burgdörfer, G. Betz, HP. Winter and F. Aumayr
Book of Inv.
Papers of the 21th Int. Conf. on the Physics of Electronic and
Atomic Collisions (XXI. ICPEAC), Sendai/Japan, July 22 - 27, 1999)
eds. Y. Itikawa,
et al. AIP Press (Melville, New York) ISBN 1-56396-777-4
Am. Inst. of
Phys. Conf. Proc., 500, 656-665 (2000)
Electron emission from clean gold bombarded by
slow Auq+ (q=1-3) ions.
H. Eder, W. Messerschmidt, HP. Winter, and F. Aumayr
J. Appl. Physics, 87,
8198-8200 (2000)
Ion induced kinetic electron emission from clean
polycrystalline gold:Impact of C+, N+, O+, Ne+,
Xe+, and Au+.
J. Lörincik, Z. Sroubek, H. Eder, F. Aumayr, and
HP. Winter
Phys. Rev. B 62, 16116-16125 (2000)
Electron emission during grazing H0 -
LiF(001) collisions.
H. Eder, A. Mertens, K. Maass, H. Winter, HP. Winter and F.
Aumayr
Phys. Rev. A 62, 52901-1-4 (2000)
Slow ion-induced
electron emission from clean surfaces: Relaxation paths of the potential and
kinetic projectile energies
H. Eder, E.
Galutschek, F. Aumayr, and HP. Winter
Uzbek Phys. J. 2, 1-8 (2000)
Excitation of plasmons by impact of slow ions in
mono- and polycrystalline aluminum.
H. Eder, P. Berlinger, H. Störi, F. Aumayr, and HP. Winter
Surface Science 472,
195-204 (2001)
Surface-induced
dissociation of singly- and multiply-charged fullerene ions.
F. Biasioli, T. Fiegele, C. Mair, Z. Herman, O. Echt, F.
Aumayr, HP. Winter and T.D. Märk
J. Chem. Phys., 113,
5053-5057 (2000)
Extension of the B2 edge code towards the
plasma core for a self-consistent simulation of ASDEX Upgrade scenarios.
H. Bürbaumer, R.
Neu, R. Schneider, D. Coster, J. Stober, F. Aumayr and HP. Winter
J. Nucl. Mat. 290-293, 571-574 (2001)
Explorative studies for the development of fast
He beam diagnostics.
S. Menhart, M. Proschek, H.-D. Falter, H. Anderson, H.
Summers, A. Stäbler
P. Franzen H. Meister J. Schweinzer T.T.C. Jones S. Cox N.
Hawkes
F. Aumayr und HP. Winter
J. Nucl. Mat. 290-293,
673-677 (2001)
Numerical
Modelling and X-Ray Spectroscopy of ECR Plasmas.
D.Küchler, F.Ullmann, T.Werner, G.Zschornack, H.Tyrroff,
P.Grübling :
Nucl.
Instr. Meth. B 168, 566-577 (2000)
Ion
Charge State Distributions in ECR Plasmas Determined from Mass
Spectrometry and X-Ray Spectrometry.
F.Ullmann, G.Zschornack, H.Tyrroff
Nucl.
Instr. Meth. B 160, 290-300 (2000)
A
Novel Room Temperature Electron Beam Ion Trap for Atomic Physics and Materials
Research.
V.P.Ovsyannikov, G.Zschornack, F.Großmann, O.K.Koulthachev,
S.Landgraf, F. Ullmann, and T.Werner
Nucl.
Instr. Meth. B 161-163, 1123-1127
(2000)
Highly
Charged Ions Produced at Room Temperature in an Warm Electron Beam Ion Trap.
V.P.Ovsyannikov, G.Zschornack, F.Groámann, S.Landgraf,
F.Ullmann, and T.Werner
Rev.
Sci. Instrum. 71, 690-692 (2000)
Highly
Charged Metal Ions Produced from Volatile Organometallic Compounds in a Room
Temperature Electron beam Ion Trap2.
T.Werner, G.Zschornack, F.Großmann, V.P.Ovsyannikov, and
F.Ullmann :
Rev.
Sci. Instrum. 71, 2038-2040 (2000)
Kinetic energy release
distributions in fragmentation of O2
molecules by fast highly charged ions.
N. M. Kabachnik, A.
Reinköster, U. Werner and H. O. Lutz
Physica Scripta, in
print (2001)
Multiple ionization and
fragmentation of C60 in collisions with fast ions.
U.Werner, B. Siegmann,
R. Mann, N. M. Kabachnik and H. O. Lutz
Physica Scripta , in
print (2001)
Kinetic energy release in H2O
and CO2 fragmentation by highly charged Xe-ions.
B. Siegmann, U.
Werner, H. O. Lutz and R. Mann
Physica Scripta , in print (2001)
Kinetic energy release
distributions in Coulomb explosion of N2 molecules induced by fast
highly charged ion impact.
B. Siegmann, U. Werner,
R. Mann, N. M. Kabachnik and H. O. Lutz
Phys. Rev.A 62, 022718 (2000)
Kinetic energy release
distributions in the fragmentation of O2 molecules.
U. Werner, B.
Siegmann, R. Mann, N. M. Kabachnik and H. O. Lutz
Physica Scripta, in
print (2001)
Excitation of autoionizing states of helium by 100 keV
proton impact: II. Excitation cross sections and mechanisms of excitation.
A. Godunov, P.B. Ivanov, V.A. Schipakov, P. Moretto-Capelle, D.
Bordenave-Montesquieu, M. Benhenni et A. Bordenave-Montesquieu
J. Phys.B 33, 971-99 (2000)
Hollow ion formation
studied by electron spectroscopy in 18O8+-C60
at 4.4 keV/amu.
A. Bordenave-Montesquieu, P. Moretto-Capelle, D.
Bordenave-Montesquieu , H. Lebius and B.A.Huber
J. Phys.B 33, L357-65 (2000)
Fragmentation of CO2 2+ into C+
+ O+ + O, in collisions with protons.
P. Moretto-Capelle,
D. Bordenave-Montesquieu et A. Bordenave-Montesquieu
J. Phys.B 33, L539-46 (2000)
Dissociative double
capture in 18O8+-CO2 collision.
P. Moretto-Capelle,
D. Bordenave-Montesquieu et A. Bordenave-Montesquieu
J. Phys.B 33,
L735-42 (2000)
Scaling of C60 ionization and fragmentation with the energy deposit in collisions
with H1+, H2+ H3+
and He+ ions (2-130 keV).
P. Moretto-Capelle, D. Bordenave-Montesquieu et A.
Bordenave-Montesquieu:
J. Phys.B 34,
in print (2001)
Interaction of
multicharged ions with molecules (CO2, C60) by coincident
electron spectroscopy.
P. Moretto-Capelle, D. Bordenave-Montesquieu et A.
Bordenave-Montesquieu:
Physica Scripta, in
print (2001)
Measurement of an electric-quadrupole transition in
doubly excited N4+-Ne7+ lithium-like ions.
A.Denis, M.C.Buchet-Poulizac, J.Bernard, L.Chen, S.Martin and J.Désesquelles
Physica Scripta 61, 431 (2000)
Number of active electrons in slow collisions of O8+ and Ar8+
with C60,
S.Martin, J.Bernard, L.Chen, A.Denis and J.Désesquelles :
EPJD 12, 27 (2000)
Excitation and fragmentation of C60r+ (r=3-9) in
Xe30+-C60 collisions.
S.Martin, L.Chen, A.Denis, R.Brédy, J.Bernard and J.Désesquelles
Phys.Rev.A 62, 022707 (2000)
Sequential and quasi simultaneous fragment emission in asymmetrical
fission of C605+.
L.Chen, S.Martin, R.Brédy, J.Bernard and J.Désesquelles :
Phys Rev.A, in print (2001)
Very fast stabilisation time of projectile in Xe30+ C60
collision.
S.Martin, L.Chen, R.Brédy, J.Bernard and J.Désesquelles :
Phys Rev.A, in print, (2001)
Electron kinetic energies in multicapture processes in Xe30++
C60 collisions.
R.Brédy, S.Martin, L.Chen, J.Bernard and J.Désesquelles
Phys Scripta , in print, (2001)
Charge transfer processes in asymmetric fragmentation of C605+
L.Chen, J.Bernard, G. Berry, R.Brédy, J.Désesquelles and S.Martin
Phys Scripta, in print (2001)
Collision spectroscopy of normal and displaced terms for
boronlike O3+, F4+ and Ne5+ ions.
J.Désesquelles,
M.C.Buchet-Poulizac, J.Bernard, R.Brédy, L.Chen, A.Denis , S.Martin and
H.G.Berry Phys Scripta, in print, (2001)
Study of multicapture cross sections using multicoincidence technique
in Xe30+ on C60,
in ‘Many Particule Spectroscopy of atoms, molecules,
clusters and particules’.
S.Martin, R.Brédy, L.Chen, J.Bernard and J.Désesquelles :
Berakdar & Kirschner, Eds . Kluwer Academic/Plenum Publishers
In print, (2001)
Laser-cooled targets and recoil ion momentum spectroscopy
for fundamental physics studies.
J.W. Turkstra, H.W. Wilschut, D. Meyer, R. Hoekstra and R. Morgenstern
Hyperf. Int., 127 , 533-536 (2000)
Molecular Fragmentation by slow highly charged ion
impact.
R.D. DuBois, T. Schlathölter, O. Hadjar, R. Hoekstra, R. Morgenstern, C.M. Doudna, R. Feeler, R.E. Olson
Europhys. Lett., 49, 41-47 (2000)
The projectile-Z effect on ion-induced fragmentation and
ionization of fullerenes.
O. Hadjar, R. Hoekstra, R. Morgenstern, and T. Schlathölter
Phys. Rev. A, 63, 33201 (2001)
Z Oscillations in Ion-Induced Fullerene Fragmentation.
O. Hadjar, P. Földi, R. Hoekstra, R. Morgenstern and T. Schlathölter
Phys. Rev. Lett., 84, 4076-4079 (2000)
Collisions of slow multicharged ions with atoms,
molecules, clusters, and surfaces.
R. Morgenstern, T. Schlathölter, R. Hoekstra
In The Physics of Electronic and Atomic Collisions (eds. Y. Itikawa, K.Okuno,
H. Tanaka, A. Yagishita and M. Matsuzawa) 65 (American Iinstitute of Physics,
New York 2000)
Hydrogenated carbon clusters produced by highly charged
ion impact on solid C84.
T. Schlathölter, M.W. Newman, T.R. Niedermayr, G.A. Machiocoane, J.W. McDonald, T. Schenkel,
R. Hoekstra and A. Hamza
Eur. Phys. J. D, 12, 363 (2000)
Sputtering of hollow atoms from carbon surfaces.
T. Schlathölter, A. Närmann, D.F.A. Winters, S. Marini, R. Morgenstern and R. Hoekstra
Phys. Rev. A, 62 (2000) 042901
Low-Energy State-Selective Charge Transfer by Multiply
Charged Ions.
G. Lubinski, Z. Juhász, R. Morgenstern, and R. Hoekstra
Phys. Rev. Lett., 86, 616-619 (2001)
Neutral beam stopping and emission in fusion plasmas I:
Deuterium beams.
H. Anderson, M. von Hellermann, R. Hoekstra, L.D. Horton, A.C. Howman, R.W.T. Konig,
R. Martin, R.E. Olson and H.P. Summers
Plasma Phys. Controll. Fusion, 42, 781 (2000)
State -selective electron-capture cross section measurements for low-energy collisions of
He-like ions with H2.
G. Lubinski, Z. Juhasz, R. Morgenstern and R. Hoekstra
J. Phys. B: At. Mol. Opt. Phys., 33 , 5275 (2000)
Electronic excitation in H+-C60
: Evaporation and ionization.
J. Opitz, H. Lebius,
S. Tomita, B.A. Huber, P. Moretto Capelle, D. Bordenave Montesquieu, A.
Bordenave Montesquieu, A. Reinköster, U. Werner, H. O. Lutz, A. Niehaus, M.
Benndorf, K. Haghighat, H. T. Schmidt and H. Cederquist
Phys. Rev. A 62, 022705 (2000)
‘Electron capture by a metastable ion in the collision Ar8+(2p53s)3P0,2
+ H2 at low velocity’.
S. Bliman, M. Cornille, B.A. Huber, J.
Nordgren and J.E. Rubensson
Phys. Rev. A, (in print) (2001)
’Highly charged ions from rare gas and metal clusters in
intense laser fields’.
S. Dobosz, M. Lezius, Ch. Ellert, O. Soublemontier, M. Schmidt, D. Normand, J. Viallon, M.-A. Lebault, C. Bordas, J. Chevaleyre, B.A. Huber and C. Guet
in ‘Laser and Particle Beams’, in print (2001)
’Fission channels of multiply charged sodium cluster near
the Rayleigh limit’.
F. Chandezon, T. Bergen, A. Brenac, C. Guet,
B.A. Huber, H. Lebius and A. Pesnelle
Phys. Rev. A, rapide communication, in print (2001)
‘Energy transfer in multi-ionizing ion/cluster
collisions’.
F. Chandezon, H. Lebius, S. Tomita, C. Guet, A. Pesnelle and B.A. Huber
Physica Scripta, (in print) (2001)
‘Angular
differential coincidence studies of electron capture and transferionisation in
proton/fullerene collisions’.
J. Opitz and B.A. Huber
Physica Scripta, (in print) (2001)
‘Ionisation
and excitation in ion-cluster collisions’.
B.A. Huber
Com. At. Mol.Phys., (in print) (2001)
‘Stopping
power and nano-particles : Collisions of ions in Low Charge States with
Metallic Clusters’.
T. Bergen, A. Brenac, F. Chandezon, C. Guet, B.A. Huber, H. Lebius, A. Pesnelle, and B.A. Huber
EPJD, (in print) (2001)
‘Highly
charged ions from lead clusters in intense laser fields’.
J. Vialon, M.A. Lebeault, J. Chevaleyre, M. Schmidt, C. Ellert, D. Normand, B.A. Huber, and C. Guet
EPJD, in print (2001)
‘Static
dipole polarizability of free alkali clusters.
Ph. Dugourd, E. Benichou, R. Antoine, D. Rayane, A.R. Allouche, M. Aubert-Frecon, M. Broyer, C. Ristori, F. Chandezon, B.A. Huber, and C. Guet
in ‘Atomic and Molecular Beams’, p. 625, Springer Verlag (2001)
"Electron-impact
multiple-ionization of negatively-charged fullerene ions"
D.Hathiramani, P.Scheier, K.Aichele, W.Arnold, K.Huber and E.Salzborn
Mol.Mat. 13, 343, (2000)
"Charge-changing ion-ion collisions"
F.Melchert and E.Salzborn
E.Salzborn
and F.Melchert
NIFS-PROC 44 , 53 (2000)
"Scaling behavior of cross
sections for electron-impact multiple-ionization of negatively charged
fullerene ions"
D.Hathiramani, P.Scheier, K.Aichele, W.Arnold,
K.Huber and E.Salzborn
Chem.Phys.Lett. 319, 13 (2000)
"Multiple ionization and fragmentation of
negatively-charged fullerene ions by electron impact"
P.Scheier, D.Hathiramani, W.Arnold, K.Huber
and E.Salzborn
Phys.Rev.Lett. 84, 55, (2000)
D.Hathiramani, K.Aichele, W.Arnold,
E.Salzborn, and P.Scheier
Phys.Rev.Lett. 85, 3604 (2000)
"Autoionizing resonances in electron-impact
ionization of O5+ ions"
A.Müller, H.Teng, G.Hofmann, R.A.Phaneuf, and E.Salzborn
Phys.Rev.A 62, 062720, (2000)
R.Traßl, H.Bräuning, K.v.Diemar, F.Melchert, and E.Salzborn
Nucl.Instr. and Meth.A, in print
"Ion-ion charge exchange collisions and
applications"
R.Traßl, H.Bräuning, K.v.Diemar, F.Melchert, E.Salzborn, and I.Hofmann
In Atomic Processes in Plasmas, ed. R.C.Mancini
AIP Conference Proceedings 547, 157, (2000)
D.Hathiramani, P.Scheier, W.Arnold, K.Huber, and E.Salzborn
Physica Scripta, in print
K.Aichele, W.Arnold, D.Hathiramani, F.Scheuermann, and E.Salzborn
Physica Scripta, in print
"Charge-changing processes in collisions between
Li-like Ions and He2+"
D.Skiera, R.Traßl, H.Kern, K.Huber, H.Bräuning, E.Salzborn, M.Keim, and J.H.Lüdde
Physica Scripta, in print
"Design
of compact all-permanent magnet electron cyclotron resonance (ECR) ion sources
for atomic physics experiments"
F.Brötz, R.Trassl, W.Arnold, and E.Salzborn
Physica Scripta, in print
"Autoionizing resonances in electron-impact
ionization of O5+ ions"
H.Teng, A.Müller, G.Hofmann, R.A.Phaneuf, and E.Salzborn
Physica Scripta, in print
"Resonant indirect processes in electron-impact
single ionization of Ne7+ ions"
K.Aichele, W.Shi, F.Scheuermann, H.Teng, E.Salzborn, and A.Müller
Phys.Rev.A 63, 014701, (2000)
"Deep-core
dielectronic-capture resonances in the electron-impact ionization of heavy
atomic ions"
K.Aichele, F.Scheuermann, A.Müller, E.Salzborn,
D.Mitnik, J.Colgan, and M.S.Pindzola
Phys.Rev.Lett. 86,
620, (2001)
"Total
and differential charge transfer cross sections in He2+ + N4+
collisions"
K.von Diemar, F.Melchert, K.Huber, R.Trassl,
E.Salzborn, L.Opradolce and R.D.Piacentini
J.Phys.B: At.Mol.Opt.Phys., in print
AM. Tarisien, L. Adoui, F. Fremont, D. Lelievre, L. Guillaume, J. Y. Chesnel, H. Zhang, A. Dubois, D. Mathur, S. Kumar, M. Krishnamurthy, A. Cassimi
J. Phys. B : At. Mol. Opt. Phys., 33, L11-L20 (2000)
Fragmentation of H22+ ions
following double electron capture in slow Xe23+ and O5+ +
H2 collisions.
F. Fremont, C. Bedouet, L. Adoui, A. Cassimi, M. Tarisien, J.Y. Chesnel, X. Husson
J. Phys. B : At. Mol. Opt. Phys. 33, L249-L258 (2000)
Ion-induced
molecular fragmentation : beyond the Coulomb explosion picture.
AM. Tarisien, L. Adoui, F. Fremont, D. Lelievre, L. Guillaume, J. Y. Chesnel, H. Zhang, A. Dubois, D. Mathur, S. Kumar, M. Krishnamurthy, A. Cassimi
J. Phys. B : At. Mol. Opt. Phys. 33, L11-L20 (2000)
Fragmentation of H22+ ions
following double electron capture in slow Xe23+ and O5+ +
H2 collisions.
F. Fremont, C. Bedouet, L. Adoui, A. Cassimi, M. Tarisien, J.Y. Chesnel, X. Husson
J. Phys. B : At. Mol. Opt. Phys. 33, L249-L258 (2000)
Electron capture by fluorinated fullerene
anions in collisions with Xe atoms.
O.V. Boltalina, P.Hvelplund, T.D.J. Jørgensen,
M.C. Larsen, M.O. Larsson, and D.A. Sharoitchenko
Phys.Rev. A 62, 023202 (2000).
Stability of the ground state vinylidene anion
H2CC.
M.J. Jensen, U.V. Pedersen, and L.H. Andersen
Phys. Rev. Lett. 84, 1128 (2000).
Fullerenes and fullerene ions in
the gas phase.
D.K. Böhme, O.V. Boltalina, and P. Hvelplund
Chapter 12 in
«Fullerenes: Chemistry, Physics, and Technology» ed. by Kadish and Ruoff, John
Wiley & Sons, Inc., in print
K. Hansen, J.U. Andersen, J.S. Forster,
and P. Hvelplund
Phys. Rev.A, in print
Fragmentation and charge
transfer in collisions involving fullerenes and fullerene derivatives.
Hvelplund P
Fullerenes 2000, Vol. 10, Chemistry & Physics of Fullerenes and Carbon
Nanomaterials,.Eds.: P.V. Kamat, D.M. Guldi, and K.M. Kadish. (The
Electrochemical Society, Pennington, N.J. (2000), in print
J.S. Nielsen, S.P. Møller, L.H. Andersen, P. Balling and M.K. Raarup
Nucl. Instrum. Meth. Phys. Research Section A, 441(1-2), pp. 150-153 (2000)
The dissociative recombination and branching ratio of HD2O+,
D3O+ and H3O+.
M.J. Jensen, R.C. Bilodeau, C.P. Safvan, L.H. Andersen, H.B. Pedersen
and O.Heber
Astrophysical Journal, in print, (2000)
Coulomb and centrigal barrier bound dianion resonances of NO2.
L.H Andersen, R. Bilodeau, M. J. Jensen, S. B. Nielsen, C. P. Safvan,
and Seiersen
J. Chem. Phys, in print, (2000)
Dissociative recombination of NO+: Calculations and
comparison with experiment.
I. F. Schneider, I. Rabadan, L. Carata, L. H. Andersen, A. Suzor-Weiner
and J. Tennyson:
J. Phys B., in print, (2000)
Electron
collisions with the diatomic flourine anion.
H.B. Pedersen, R. Bilodeau, M.J. Jensen, I.V. Makassiouk, C.P. Safvan
and L.H. Andersen
Phys. Rev. A., in print, (2000)
Probing the lowest coordination number of dianionic platinum-cyanide
complexes in the gas
phase. Dynamics of the charge dissociation process.
G.Bojsen, P. Hvelplund, T.J.D. Jorgensen, and S.B. Nielsen
J.Chem. Phys., in print, (2000)
Two- And Three-Body Effects in Fast Ion-Atom Collisions :
Analogies Between Photon and Charged Particle Impact"in "X-Ray and
Inner-Shell Processes.
N. Stolterfoht, B. Sulik et al.,
AIP Conf. Proc. , 506, 427-443 (2000).
One- and
two-K-shell vacancy production in atomic Li by 95-MeV/u Ar(18+) projectiles.
J. A. Tanis et al
Phys. Rev. A, 62, 032715 (2000)
"Rainbow
and glory effects : Coulomb focusing and defocusing post-collision interaction
in fast proton and antiproton impact".
Gy. Vikor, B. Paripas, S. Ricz, B. Sulik, L.
Vikor,
J. Phys. B, 33, 4353 (2000)
First studies of state-selective electron capture in collisions of
state-prepared ions with atomic hydrogen: the case of C2+ - H(1s).
D. Voulot, D.R. Gillen, W.R. Thompson, H.B. Gilbody, R.W. McCullough, L. Errea, A. Macias, L. Mendez, and A. Riera
J Phys B: At Mol Opt Phys. 33, L1-L7 (2000)
A study of the
emission characteristics of an rf plasma source for atomic oxygen: atom, ion,
electron and optical measurements.
D.M. Kearns, D.R. Gillen, D.Voulot, R.W. McCullough, W.R. Thompson, G.J. Cosimini, E. Nelson, P.P. Chow, and J. Klaassen
J Vac Sci. Technol. A, (2000)
Nitrogen
doping of amorphous diamond-like carbon films by RF plasma dissociated nitrogen
atom surface bombardment in a vacuum.
A.A. Ogwu, D. Magill, P. Maguire, J. McLaughlin, R.W. McCullough, and D. Voulot
Surface Engineering 16, in print, (2000)
Secondary
electron/reflected particle coincidence studies during slow highly charged
ion-surface interactions.
C.T. McGrath, Z. Szilagyi, M.B. Shah, R.W. McCullough, and J.M. Woolsey
Physica Scripta, in print, (2000)
State selective electron capture by state prepared
beams of multiply charged ions in atomic hydrogen.
D.M. Kearns, D. Voulot, D.R. Gillen, R.W. McCullough, and H.B. Gilbody
Physica
Scripta, in print, (2000)
Design of compact all-permanent magnet electron
cyclotron resonance ion sources for atomic physics.
F.Broetz, R. Trassl, R.W. McCullough, W. Arnold, and E. Salzborn
Physica
Scripta, in print, (2000)
Measurements of
Absolute, Single Charge Exchange Cross Sections of H+, He+
and He2+ with H2O and CO2 .
J.B. Greenwood, A. Chutjian and S. J. Smith
Astrophysical Journal 529, 605-609 (2000)
Measurement
of Charge Exchange and X-ray Emission Cross Sections for Solar Wind-Comet
Interactions.
J.B. Greenwood, I.D. Williams, S.J. Smith and A. Chutjian
Astrophysical Journal, 533, L175 (2000)
Electron Excitation
Cross Sections for the 3s23p2 3P ® 3s3p3 5S
transition in S2+.
S.J. Smith, J.B.
Greenwood and A. Chutjian
Astrophysical Journal, in press, (2000)
The
Cool on the Hill.
F.J. Currell, T.Kinugawa and S.Ohtani
Riken Review, in print, (2000)
High energy
operation of the Tokyo-electron beam ion trap/present status 2000.
H. Kuramoto et. al.
Rev. Sci. Instr. 71, 687-689 (2000)
Characteristics
of the beam line of the Tokyo electron beam ion trap.
H. Shimizu et. al.
Rev. Sci. Instr. 71, 681-68 (2000)
Application
to argon ions of a new technique to measure the two-electron contribution to
the ground state energy of helium-like ions
F. J. Currell, J. Asada, T.V. Back, C.Z. Dong, H.S. Margolis, N. Nakamura, S. Ohtani, J.D. Silver and H.Watanabe
J. Phys. B: At. Mol. Opt. Phys., 33, 727-734 (2000)
Experimental
Investigation of the Processes Determining X-ray Emission Intensities from
Charge Exchange Collisions.
J. B. Greenwood, I. D. Williams , S. J. Smith and A. Chutjian
Physical Review A, submitted, (2000)
X-ray Emission from Charge Exchange of Highly Charged
Ions in Atoms and Molecules.
J. B. Greenwood, I. D. Williams, S. J. Smith and A. Chutjian
Physica Scripta, in
print, (2000)
T.J.M. Zouros, E.P.
Benis and J.E. Schauer
AIP Press, in print.
(2001)
Theoretical investigation of transfer-loss process in
0.2-2 MeV/u collisions of O5+ ions with H2 and He
targets.
B. Sulik, T.J.M. Zouros, A. Orban, L. Gulyas
J. Electron Spectroscopy and Related Phenomena, in print (2000).
Low energy high resolution dissociative electron attachment to ozone, in the Physics of electronic and Atomic Collisions.
G. Senn, H. Drexel, N.J. Mason, J.D. Skalny, A.
Stamatovic, P. Scheier, T.D. Märk
AIP, eds. Y.
Itikawa et al., 442-448 (2000)
Surface induced reactions of Cn+, 52 60.
T. Fiegele, O. Echt, F. Biasioli, C. Mair, T.D. Märk
Chem. Phys. Lett. 316, 387-394 (2000)
Calculated cross sections for the multiple ionization of nitrogen and argon atoms by electron impact using the DM formalism.
H. Deutsch, K. Becker, T.D. Märk
Plasma Phys. Controlled Fussion 42, 489-499 (2000)
Surface-induced reactions of singly – and multiply charged parent and fragment ions of C60, Clusters and Nanostructure Interfaces.
O. Echt, F. Biasioli, T. Fiegele, C. Mair, Z. Herman, P. Scheier, T.D. Märk
eds. P. Jena
et al. , World Scientific, 449-454 (2000)
Surface-induced dissociation of singly and multiply charged fullerene ions.
F. Biasioli, T. Fiegele, C. Mair, Z. Herman, O. Echt,
F. Aumayr, H.P. Winter, T.D. Märk
J. Chem.
Phys. 113, 5053-5057 (2000)
Calculation of absolute electron-impact ionization cross sections of dimers and trimers using a macroscopic defect concept.
H. Deutsch, K. Becker, T.D. Märk
Europ. Physics Journal D 12, 283-287 (2000)
Kinetic energy release in electron induced decay reactions of molecular ions: C3H8+ and C3H7+.
S.
Matt, O. Echt, A. Stamatovic, T.D. Märk
J.
chem. Phys. 113, 616-620 (2000)
Electron attachment to oxygen and nitric oxide clusters, Atomic and Molecular Beams.
G.
Senn, P. Scheier, T.D. Märk
Ed.
R. Campargue, Springer, Berlin, p.
683-692 (2000)
Kinetics and energetics of electron impact ionization cross section, appearance energy and kinetic energy release.
S.
Matt, T. Fiegele, G. Hanel, D. Muigg, G. Denifl, K. Becker, H. Deutsch, O.
Echt, N. Mason, A. Stamatovic, P. Scheier, T.D. Märk,
Atomic
and Molecular Data and their Applications (K. Berrington, K.L. Bell Eds.)
AIP
Conference Proceedings 543 (2000) 191-208
Isomer effect in the total electron-impact ionisation cross section of cyclopropane and propane (C3H6).
H.
Deutsch, K. Becker, R.K. Janev, M. Probst, T.D. Märk
J.
Phys. B Letters 33, L865-L872 (2000)
High resolution electron ionization of N2O clusters: appearance energies.
G.
Hanel, T. Fiegele, A. Stamatovic, T.D. Märk
Z.
Phys. Chemie 14, 1137-1149 (2000)
Threshold electron impact ionization of carbon tetrafluoride, trifluormethane, methane and propane.
T.
Fiegele, G. Hanel, I. Torres, M. Lezius, T.D. Märk
J.
Phys. B 33, 4263-4283 (2000)
Novel decay channels of carbon cluster ions, C40z+ and C41z+ /z=3,4).
R.
Parajuli, P. Scheier, V. Grill, S. Matt, O. Echt, T.D. Märk
Chem.
Phys. Letters 330, 53-60 (2000)
Calculations of absolute electron-impact ionization cross sections for molecules of technological relevance using the DM formalism.
M.
Probst, H. Deutsch, K. Becker, T.D. Märk
Int.
J. Mass Spectrom., in print (2001)
Dissociative electron attachment to N2O clusters: attachment spectra for (N2O)nO- anions (n = 0-7) from zero up to 25 eV.
G.
Hanel, T. Fiegele, A. Stamatovic, T.D. Märk
Int.
J. Mass Spectrom. 205, 65-76 (2001)
On the operational principle of an electron monochromator in an axial magnetic field.
V.
Grill, H. Drexel, W. Sailer, M. Lezius, T.D. Märk
J.
Mass Spectrometry, in print (2001)
Absolute calibration of relative electron attachment cross sections measured by crossed-beams experiments.
J.
D. Skalny, S. Matejcik, P. Cicman, J. Vencko, G. Senn, A. Stamatovic, T.D. Märk
Int.
J. Mass Spectrom. 205, 77-84 (2001)
Electron impact ionization of edge plasma constituents.
S.
Matt, T. Fiegele, G. Senn, K. Becker, H. Deutsch, O. Echt, A. Stamatovic, P.
Scheier, T.D. Märk
in
Atomic and Plasma-Material Interaction Data for Fusion, IAEA, in print (2001)
Electron and ion high resolution interaction studies using sector field mass spectrometry: propane as a case study.
T.
Fiegele, V. Grill, S. Matt, M. Lezius, G. Hanel, M. Probst, P. Scheier, K.
Becker, H. Deutsch, O. Echt, A. Stamatovic, T.D. Märk
Vacuum,
in print (2001)
Calculated cross sections for the multiple ionization of krypton and chromium atoms by electron impact.
H.
Deutsch, K. Becker, T.D. Märk
Contr.
Plasma Phys. 41, 73-83 (2001)
,Detection of sputtered and evaporated carbon aggregates: relative and absolute electroionization fragmentation yields.
C.
Mair, H. Deutsch, K. Becker, T.D. Märk, E. Vietzke
J.
Nuclear Materials, in print (2001)
Hydrogen cluster multifragmentation and percolation models.
F.
Gobet, B, Farizon, M. Farizon, M.J. Gaillard, J.D. Buchet, M. Carre, P.
Scheier, T.D. Märk
Word
Scientific, in print (2001)
Calculated absolute electron-impact ionization crss sections for AlO, Al2O and
WOx (x = 1-3).
H. Deutsch, K.
Hilpert, K. Becker, M. Probst, T.D. Märk
J. Appl. Phys. 89, (2001)
The arking principle of the trochoidal electron monochromator revisted.
V.
Grill, H. Drexel, W. Sailer, M. Lezius and T.D. Märk
Int.
J. Mass Spectrom. 205, 209-226 (2001)
Cluster multifragmentation and percolation transition: a quantitative comparison for two systems of the same size.
F.
Gobet, B. Farizon, M. Farizon, M. Gaillard, J.P. Buchet, M. Carre, P. Scheier,
T.D. Märk
Phys.
Rev. A, in print (2001)
Dissociative electron attachment to hydrogen.
H.
Drexel, G. Senn, T. Fiegele, P. Scheier, A. Stamatovic, N.J. Mason, T.D. Märk
J.
Phys. B., in print (2001)
Decay reactions of rare gas cluster ions: kinetic energy release distributions and binding energy.
R.
Parajuli, S. Matt, O. Echt, A.
Stamatovic, P. Scheier, T.D. Märk
Europ. Physics Journal D, in print (2001)
High resolution analysis of the kinetic energy distribution of fragment ions produced by dissociative ionization of propane.
T. Fiegele, C. Mair,
P. Scheier, K. Becker, T.D. Märk
Int. J. Mass Spectrometry, in print (2001)
Plasmon production by the decay of hollow
Ne atoms near an Al surface.
N.
Stolterfoht,
D. Niemann, V. Hoffmann, M. Rösler, R. Baragiola
Phys. Rev. A 61, 052902-1 (2000)
Looking into hollow Ne and Ar
atoms created below the surface
N. Stolterfoht,
M. Grether, D. Niemann, V. Hoffmann and J.-H. Bremer
in ‘Exploration of Subsurface Phenomena by Particle Scattering’, Edited
by Nhi Lam, C. A. Melendres, S. K. Sinha, International Advanced Studies
Institute, Science and Technology Series (IASA Press, ISBN 0-9701790-0-6), p.
21 (2000)
Electron emission from slow
Ar17+ Ions Interacting with a Si surface
N. Stolterfoht,
V. Hoffmann, D. Niemann, and J.-H. Bremer
American Institute Physics Proceedings 500 (AIP, New York), p. 646 (2000)
Mechanisms for plasmon
production by highly charged neon ions interacting with an Al surface.
N. Stolterfoht, J.H. Bremer, V. Hoffmann, D. Niemann, M.
Rösler, and R. A. Baragiola
Physica Scripta, in print (2001)
Mechanisms for plasmon
production by hollow atoms above and below an Al surface.
N. Stolterfoht, J.H. Bremer, V. Hoffmann, M. Rösler, and
R. A. Baragiola
Nucl. Instrum. Meth. in Phys. Res. B, in print (2001)
Latent Ion Tracks In Mica
Studied With Scanning Force Microscopy In Air And In Vacuum.
V. Hoffmann, J.H. Bremer, S. Bouffard, and N. Stolterfoht
American Institute
Physics Proceedings (AIP, New York), in print (2001)
Slow ions scattering on C60:
The electronic response of the C60 molecule and its ions.
H. Cederquist, A. Fardi, K. Haghighat, A. Langereis, H.T. Schmidt, J. Levin, I.A. Sellin; H. Lebius, B. Huber, M.O. Larsson, and P. Hvelplund in the Proceedings from the XXIst International Conference on the Physics of Electronic and Atomic Collisions, Sendai, Japan 1999 Edited by I. Itikawa, K. Okuno, H. Tanaka, A. Yagishita, M. Matsuzawa, AIP (2000).
Electronic response of C60
in slow collisions with highly charged ions
H. Cederquist, A.
Fardi, K. Haghighat, A. Langereis, H.T.
Schmidt, S.H. Schwartz, J.C. Levin, I.A. Sellin, H. Lebius, B. Huber, M.O.
Larsson, and P. Hvelplund,
Phys. Rev. A 61, 022712 (2000).
Non-fragmenting charge
transfer in slow peripheral C60q+-C60
collisions.
H. Cederquist, P. Hvelplund, H. Lebius, H.T.
Schmidt, S. Tomita, and B.A. Huber
Phys. Rev. A 63, 025201 (2001).
Subsurface-Channeling-Like Energy
Loss Structure of the Skipping Motion on an Ionic Crystal.
J. Villette, A. G.
Borisov, H. Khemliche, A. Momeni, and P. Roncin
Phys. Rev. Lett. 85, 3137, 2000
Surface exciton population in
proton impact with LiF(100).
H. Khemliche, J.
Villette, P. Roncin, M.Barat
Nucl. Instr. and Meth.
B 164, 608, 2000
Calibration of a multiple
microchannel plate detectors system by alpha-induced secondary electrons.
J. Villette, M. Barat,
P. Roncin
6.4 Milestones and deliverables
In the project programme of this network a list of milestones and deliverables has been established. In the following an actual overview on the status and the schedule for the different subjects will be given.
Central
webpage has been
installed, is partly under construction and is
pemanently
actualised ;
Local
webpages most of the
participants have developed a local LEIF-
homepage ;
project pages will be initiated in 2001 ;
Newsletter this activity
will start in 2001 with 1 or 2 editions ;
Beam
time application standardised
beam time application forms will be available and beam time demand via Internet
will be accessible in view of the second annual meeting
Reports the following
reports have been delivered :
Report 1 : Kick-off
meeting
Report
2 : 1st Annual LEIF-meeting
Report
3 : 1st Annual
Scientific and Technical report
Report
4 : 1st Annual
Financial report
In addition
the summaries of 2 quality meetings are available on the website.
Project 2: Quality and Management
Centralised
beam distribution will be started in
2002 or 2003 ; an agenda for a
beam
time committee is actually in progress.
Standardised
forms and protocols a standardised
method for characterising ion beams has been defined (emittance and intensity)
Application
of quality norms instead
of the ISO-9000 family, a LEIF-quality referential is in progress. 2 meetings
took place in 2000.
Report
on beam time attribution not yet
started
List
of high priority developments not
yet started
Project 3: On-line access
Data
control and acquisition an
inventory on existing LEIF systems has been made
Standardisation
of experimental as a standard
system LABVIEW has been chosen, a
control corresponding
course will be organised in Sept. 2001
Remote
control of experiments different projects
concern the remote control of ion
sources
On-line
access to shared data will be
started in 2002 or 2003
Project 4: Common tools and multi-coincidence
detectors
Existing
detector systems an
inquiry has been performed, the result is on the webpage. A detector workshop
will take place in Sept. 2001
Detectors
for users and operators different
collaborations have been initiated to test the characteristics and the
universality of different systems
Report
and construction design planned
for 2001 and 2002
Multi-purpose
chamber an actual
realisation turned out to be difficult; will be reconsidered in the future
Project 5:
Ion beam production
State-of-the-art
sources an inventory
on LEIF ion sources has been made ; 2 workshops will take place in early
2001 concerning ECR-sources and sources for complex ions
Temperature
control in this
context the application of electrostatic rings or traps is under discussion
Beams
with low energy spreads will be
discussed on the workshops in close relation with project 6
Project 6: Beam control and deceleration
Report
on ion beams an
inventory on LEIF ion beams has been made ; actual beam intensities will
be replaced in future by those measured under standard conditions
Ion
beams at eV energies different
deceleration techniques have been and will be discussed during a deceleration workshop in September
2001 (during 2nd annual meeting)
Single-state
ion beams under
discussion
In-situ
beam control not
yet started