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General Program Advisory Committee (G-PAC)

The General PAC is the international program advisory committee of GSI with external 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. Following periodic calls for proposals, the General PAC meets to evaluate those experiment proposals on the basis of scientific merit and technical feasibility and with regard to the GSI 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 for various research fields.

A 'Call for Experiment Proposals for Beamtime in 2018/2019', in FAIR-Phase-0 which is a preparatory phase for FAIR, is open now. In particular, it will exploit the beam conditions of the accelerator facilities of GSI, which have been upgraded to serve as FAIR injector. FAIR-Phase-0 will also allow the use of detectors, which have been developed for FAIR, plus the new FAIR CRYRING storage ring.

Since during this period also major construction work for FAIR is going on, operation will be limited to approximately 3 months per year. The present ‘Call for Proposals’ offers approx. 600 shifts of beamtime at UNILAC, 400 shifts at SIS18 and 170 shifts at ESR & Cryring (additional running of Cryring stand-alone is envisioned) for experiments. While the beamtime of this call is for two years (2018/2019) a smaller fraction of the 2019-beamtime will be allocated in a next call in 2018.

For experiments with the PHELIX laser, approx. 170 laser shifts are available in the period between May 2018 and April 2019.


The deadline of the 'Call' has been extended until June 19, 2017.

Please note that beamtime granted in this call is valid only for the time indicated.

General information for Users of GSI can be found here:

Proposals are to be submitted through the webform 'Call_Proposals_2017', except for experiments with the PHELIX Laser, which are to be submitted through the webform 'Proposals-PHELIX'.


Selection of Program Advisory Committees (PAC) in the webform Call_Proposals_2017:

G-PAC: experiments in Nuclear and Atomic Physics, and Plasma Physics (w/o PHELIX)

Mat-PAC: experiments in Materials Research

Bio-PAC: experiments in Biology / Radio-Biology


 Webform Proposals-PHELIX:

PHELIX Committe: experiments with the PHELIX Laser

Details on the PHELIX Committee and PHELIX are given here: PHELIX Committee.


Before submitting a proposal, please contact your local contact person, e.g. on technical questions and on feasibility!

Deadline for proposal submission has been prolonged until June 19, 2017.



Please note that a proposal consists of three parts: A) the online questionnaire, B) the proposal text itself and C) a safety form.

A) Online Questionnaire: Please complete the online webform incl. uploading the proposal itself and the supplement from on safety aspects, and submit it.

B) The Proposal should be structured and contain the following information:

Cover Sheet (1 page): Title, Spokesperson (name, E-mail address, mailing address), GSI Contact Person, Requested Beam Facility and Target Station, Energy, Flux and Ion Species, Main experimental/Scientific goal(s) (max. 4-5 lines), indication whether Continuation of a previous proposal (give experiment number), and Number of Shifts Requested (main or parasitic);

Proposal Text (max. 9 pages): Title, Spokesperson, Participants; Abstract;

Scientific Context and Motivation (state-of-the-art), Previous experiments and Background (incl. theory);  

Objectives and Expected Results; Experimental Methods, New Approach in this proposal; Set-up, Technical Requirements, Justification of beamtime request; For a continuation request, a brief status report of the previous as well as an outline of the future experiment should be given.

3 major publications of the spokesperson, References;

C) Supplement Form for Safety Aspects: The safety form has to be submitted together with the proposal for beamtime. It can be downloaded from the webpage of the online webform.

Please calculate your beamtime request according to the nominal intensities given in this table for some ion species as examples, as they can be expected 'on-target' for the experiments. If you need further details, please contact your GSI contact person.


Technical Restrictions:

  • UNILAC: Operation above 8.6 MeV/u only with max. rate of 10 Hz and pulse length of 1ms.
  • ESR/CRYRING: Restricted performance depending on commissioning status.


Technical information on PHELIX is specified on the webpages of the PHELIX Committee and the PHELIX laser.

for G-PAC (General PAC):

  • Sydney Galès (Chair)
    IN2P, France
  • Yorick Blumenfeld
    IPN Orsay, France
  • Jana Bielcikova
    Nuclear Physics Institute, The Czech Academy of Sciences, Rez, Czech Republic
  • Paul Greenlees
    University of Jyväskylä, Finland
  • Paul Indelicato
    CNRS, Lab. Kastler Brossel, France
  • André Mischke
    Utrecht University, The Netherlands
  • Witold Nazarewicz
  • Gerda Neyens
    KU Leuven, Belgium
  • Marek Pajek
    Jan Kochanowski University, Kielce, Poland
  • Thomas Pfeifer
    Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany
  • Achim Schwenk
    Technical University Darmstadt, Germany
  • Tomohiro Uesaka
    RIKEN, Japan
  • Eberhard Widmann
    Stefan Meyer Institute for Subatomic Physics, Vienna, Austria

for PHELIX Committee (Laser and Plasma Physics):

  • Brigitte Cros
    CNRS, Université Paris-Sud, France
  • Dirk Gericke
    University of Warwick, UK
  • Alexander Golubev
    ITEP, Moscow, Russia
  • Peter Thirolf (Chair)
    LMU, München, Germany
  • Vladimir Tikhonchuk
    CELIA, Université Bordeaux, France

for Mat-PAC (Materials Research):

  • Thomas Cornelius
    CNRS, IM2NP (UMR 7334), Aix-Marseille Université, Marseille, France
  • Yong Dai
    PSI, Villigen, Switzerland
  • Siegfried Klaumünzer
    (formerly HZB, Berlin, Germany)
  • Zuzanna Siwy
    University of California, Irvine, USA

for Bio-PAC (Biophysics and Radiobiology):

  • Laure Sabatier
    CEA, Paris, France
  • Oliver Jäkel
    DKFZ, HIT, Heidelberg, Germany

PAC Secretaries


Dr. Karin Füssel

GSI, Darmstadt

Phone: +49-6159-71 1441

contact by E-Mail to: K.Fuessel(at)gsi.de



Dr. Ina Schubert

GSI, Darmstadt

Phone: +49-6159-71 2033

contact by E-Mail to: I.Schubert(at)gsi.de



Dr. Karin Füssel

GSI, Darmstadt

Phone: +49-6159-71 1441

contact by E-Mail to: K.Fuessel(at)gsi.de


Next PAC Meeting

Date of the next meetings of G-PAC and Mat-PAC: September 19-21, 2017

Proposals for G-PAC will be presented to the G-PAC (in public sessions) during the G-PAC Meeting. For the agenda please see here: Agenda G-PAC43

Proposals for the sub-PACs Mat-PAC, Bio-PAC and PHELIX Committee will be evaluated by the respective committee based on the written proposals.

All spokespersons will be informed on the directorate's decision of granting beam time within the weeks following the G-PAC meeting.


(Acces to document is restricted)

G-PAC42 / All-PAC in December 2015 (in writing)

G-PAC41/All-PAC on April 17, 2015: Agenda

G-PAC40 on November 23/24, 2011: Agenda G-PAC40

G-PAC39 on November 2/3, 2010: Agenda G-PAC39, Minutes G-PAC39

G-PAC38 on April 20/21, 2010: Agenda G-PAC38, Minutes G-PAC38

G-PAC37 on October 20/21, 2009: Agenda G-PAC37, Minutes G-PAC37

All-PAC01-Meeting on October 21, 2009: Agenda All-PAC01, Minutes All-PAC01