
General Program Advisory Committee (G-PAC)
The General PAC is an international program advisory committee of GSI and FAIR with external experts as members. The General PAC gives advice to the Directorate on selecting experiment proposals that are submitted by individual users or user groups in the areas of nuclear and atomic physics, currently for the FAIR Phase-0 program. Following periodic calls for proposals, the General PAC meets to evaluate those experiment proposals on the basis of scientific merit and with regard to the GSI/FAIR strategy, and advises the GSI/FAIR Scientific Director on the amount of beamtime to be approved.. The G-PAC also acts as umbrella for the different sub-PACs of GSI/FAIR for various research fields.
Call for proposals for experiments at CRYRING in 'standalone' mode in 2027/28
The GSI/FAIR Scientific Management is issuing a call for beamtime proposals regarding physics at the CRYRING in standalone mode, i.e. with use of internal ion sources only. This beamtime is foreseen for a period between October 2027 and March 2028, with an expected total of around 120 shifts of 8 hours each.
Instrumentation and machine performance on a similar level as in 2026 can be expected, i.e. ion beams will be injected from the existing 10-GHz ECR ion source. To guide the proposers with expectation values, an overview table of beam parameters from past beamtimes is given at https://www.gsi.de/cryring
Proposals are invited for submission via the GATE system starting 1. 11. 2026 with the deadline on 1.2.2027 (http://gate.gsi.de/cgi-bin/gate) - different from last time for CRYRING proposals! Submitted proposals will then be evaluated by an external board of experts, decisions of the Scientific Managing Director are expected in March 2027. Guidelines for proposals are to be followed and can be found on https://www.gsi.de/g-proposal_structure Please take note of the six-page limit!
The Scientific Secretary Dr. Manuel Vogel can be contacted for questions on proposal submission.
Please note: Participants with Russian or Belarussian affiliation are currently excluded from proposing and participating in experiments at FAIR/GSI.
Proposals are submitted electronically via GATE.
'Call for Proposals' are sent to users registered in GATE, to the users' mailinglist, and published on this webpage. For registering to the users' mailinglist please see the Users Webpage.
Information on applications and scheduling of beamtime is given under the websites: Applying for Beamtime, respectively Scheduling. General information on beamtime can be found here.
For general information on submission of proposals see: Procedure to Apply for Beamtime.
For proposal and user management we use the platform GATE: General Access Tool to the Experimental facilities of GSI / FAIR (GATE).
Registration to GATE under: https://gate.gsi.de.
GATE Short Manual for Users: here
Registration in GATE is possible independant of an open 'Call' at any time and registered users will be informed on new 'Calls'. So it is advisable for interested users to register any time.
All (!) users, i.e. participants of a proposal and experimentalists coming on-site for the experiment need to be registered in GATE (and allow being visible for other users' search in GATE).
Proposals are to be submitted via the website-based submission system GATE, to which each participant of a proposal is required to register1. More detailed information gives the short GATE manual.
In particular, we urgently ask you to consult the Link Scientist of the experimental site in question as soon as possible and well before final submission to discuss technical details and feasibility of the experiment, and for guidance with the application forms. The Link Scientist is to be chosen within the GATE forms, and is to be contacted latest via GATE in the step ”Submit” upon a first draft completion of all forms. Entries can be modified any time up to final submission. It is recommended to begin the process as early as possible.
A pdf file describing the proposed experiment is to be uploaded; details on its structure and content are given here. Should you encounter problems in GATE, please contact GATE-Help(at)gsi.de (Karin Füssel).
Please note that due to current European sanctions participants with Russian or Belarussian affiliation cannot be participants in experiment proposals at GSI/FAIR.
GATE website: https://gate.gsi.de
Submitted proposals will be evaluated by external experts, whose recommendation will be considered by the Scientific Managing Director when granting beamtime2. Beamtime granted in this round will expire after 2028.
Research Data Management Plan (RDMP):
Currently, a RDMP is not obligatory but recommended for accepted experiment proposals. For more information see this document.
We are looking forward to an exciting science program in FAIR Phase-0!
Contact persons for the 'Call' are:
Scientific Secretary: Manuel Vogel
For issues with GATE: GATE-Help
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(1) All participants of a proposal need to register themselves and allow being searchable for other users. General Data Protection Regulation GDPR apply according to Art. 13 and 14 DSGVO: Staff Management Board GDPR english
(2) Beamtime is granted at no charge within the framework of the Helmholtz Association: "Rahmenrichtlinie über die Nutzung von Forschungsanlagen der Helmholtz-Zentren durch Dritte” (1.3.2000), §II. 1.2. GSI/FAIR need to report to funding agencies on user operation and user communities in form of statistical data.
Please note that GSI does not cover the consumables and investments necessary for running an experiment.
During proposal submission the Proposer is explicitly asked to indicate host lab resources required for the proposed experiment additional to beamtime requests. This serves the respective departments as preliminary information only. Later, when planning the execution of your experiment you need to contact the respective host department directly and with updated, detailed requirements!
Knowing your requirements in advance, i.e. in the proposal form, helps us as host lab to offer the best possible service and enable experiments to be set up and run in an optimal way.
In the webform you are asked to mark whether and which host lab resources you will need, incl. specifications. Together with your Link Scientist, you can restrict your information there to a minimum and best guesses from experience. In case of doubts, the respective department will come back to you with further questions.
With this, we avoid discovering after granting a proposal, that the proponents had expected service of GSI, which cannot be supplied (at the required time/in that detail or volume) and thus a granted experiment cannot run.
A Research Data Management Plan (RDMP) is currently not mandatory, but users are asked to plan ahead of time how to take, manage, process and store their data, and think about its later publication. This also helps in formulating a request for host lab resources, e.g. IT support, if required. For more information on RDMP see this document.
Experiments with granted beamtime (i.e. ranked A) are listed in this table. It contains experiments in the status after granting and before completion/expiry, incl. number of granted shifts.
Experiments in the reserve list have been ranked A- due to large overdraft of beamtime. Experiments from this reserve list might be scheduled if additional beamtime becomes available.
Data in these lists are updated before and after a beamtime block.
Further information on application and scheduling of beam time is given under the websites Applying for Beamtime and Scheduling, respectively. General information on beam time can be found here.
Members of the G-PAC
- Eberhard Widmann (Chair)
Stefan Meyer Institute for Subatomic Physics, Vienna, Austria
- Toshiyuki Azuma
Riken, Japan
- Jana Bielcikova
Nuclear Physics Institute of the CAS, Czech Republic
- Yorick Blumenfeld
IPN Orsay, France
- Philippe Crochet
LPC, Clermont-Ferrand, France
- Paul Greenlees
University of Jyväskylä, Finland
- Magda Kowalska
CERN, Switzerland
- Witold Nazarewicz
FRIB/MSU, USA
- Marek Pajek
Jan Kochanowski University, Kielce, Poland
- Marina Petri
University of York, UK
- Thomas Pfeifer
Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany
- Achim Schwenk
Technical University Darmstadt, Germany
- Tomohiro Uesaka
RIKEN, Japan
G-PAC Scientific Secretaries
Presently, there is no meeting of the committee planned, nor is there any open 'Call for Beamtime Proposals'.
Users registered in GATE indicating their interest in our facilities will be informed on new calls.
| Previous G-PAC meetings: |
| meeting # | date | meeting web page |
| 46 | 18-20 February 2025 | https://indico.gsi.de/event/21211/ |
| 45 | 28-30 September 2022 | |
| 44 | 26-28 August 2020 | https://indico.gsi.de/event/10142/ |
| 43 | 19-21 September 2017 | https://indico.gsi.de/event/6300/ |
| 41 | 17 April 2015 | https://indico.gsi.de/event/3524/ |
| 40 | 23-24 November 2011 | |
| 39 | 2-3 November 2010 | https://indico.gsi.de/event/1458/ |
| 38 | 20-21 April 2010 | https://indico.gsi.de/event/1802/ |
| 37 | 20-21 October 2009 |

