
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 makes recommendations on the amount of beam time to be allotted by the directorate. The G-PAC also acts as umbrella for the different sub-PACs of GSI/FAIR for various research fields.
'Call for Proposals' for beamtime in 2026/2027 - (closed since December 02, 2024)
We hereby invite you to submit experiment proposals in the framework of FAIR Phase-0, which offers beamtime for experiments at GSI until the start of FAIR. The FAIR Phase-0 program is exploiting the facilities of GSI, upgraded to meet the requirements as FAIR injectors, plus the FAIR CRYRING storage ring and the PHELIX laser. Moreover, it offers an opportunity to use detectors developed for FAIR for scientific programs.
The present Call for Proposals is foreseen to offer user beamtime in the areas of nuclear and atomic physics in 2026 and 2027 combined of roughly
- 185 shifts at UNILAC,
- 200 shifts at SIS18,
- 255 shifts in total for at ESR, ESR-HITRAP and ESR-CRYRING,
For experiments at CRYRING in standalone-mode (internal ion sources only) a ‘Call’ for beamtime in 2026 will be communicated in 2025.
A list of typically available beam parameters can be found here.
Your proposal must be submitted by 2nd of December 2024.
Detector Tests:
Beamtime applications for detectors tests in 2026/27 (i.e. test of detectors or similar instrumentation but w/o direct scientific goal (!), in parasitic beam mode): please contact the PAC Scientific Secretary (Dr. Manuel Vogel) to obtain specific access and instructions for this. Deadline is the same as for scientific proposals.
During proposal submission the Proposer is explicitly asked to indicate host lab resources required for the proposed experiment additional to beamtime requests. Related to preparations for FAIR, technical and infrastructure departments often have very tight time schedules and need to plan carefully with respect to time and manpower. In order to offer the best possible service enabling the experiments to be set up and run in an optimal way, we need to know all requirements to us as host lab in advance.
In the webform you are asked to mark whether and which resources you will need, incl. further specifications on this request. This will allow the involved departments to confirm the feasibility. Together with your local contact person, you can restrict your information there to a minimum and best guesses from experience or after consulting the department involved. In case of doubts, the respective department will come back to you with further questions before confirming feasibility of your experiment.
While this information in the proposal serves as rough information only, when planning the execution of your experiment you need to contact the respective host department directly and with concrete details on your requirements.
We absolutely want to avoid the situation in which after evaluation and granting we discover, that the proponents had expected service of GSI, which cannot be delivered (at the required time/in that detail or volume) and thus a granted experiment cannot run.
Since 2021 we are using a new platform for proposal and user management: The 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 (!) 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).
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, and gives number of granted shifts.
Experiments in the reserve list have been ranked A- due to large overdraft of beamtime. They might be scheduled if beamtime becomes available.
Data 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, The Czech Academy of Sciences, 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
Next G-PAC Meeting
Date of the next G-PAC Meeting: February 18-20, 2025
Recent G-PAC Meetings
G-PAC45 on September 28-30, 2022: documents of the meeting (for G-PAC members only)
G-PAC44 on August 26-28, 2020: documents of the meeting (for G-PAC members only); Public Agenda
G-PAC43 on September 19-21, 2017; Public Agenda
G-PAC42 / All-PAC in December 2015 (in writing)
G-PAC41/All-PAC on April 17, 2015
G-PAC40 on November 23/24, 2011
G-PAC39 on November 2/3, 2010
G-PAC38 on April 20/21, 2010
G-PAC37 on October 20/21, 2009
All-PAC01-Meeting on October 21, 2009
User Services
Information for Users on services and beam time can be found on the Users' Webpages.
Central point of contact for associated guests and users on campus is the Welcome Office.
General Data Protection Regulation GDPR (according to Art. 13 and 14 DSGVO): Staff Management Board GDPR english