PHELIX Committee

The PHELIX Committee is an international program advisory committee of GSI. It gives advice to the GSI Directorate on selecting experiment proposals that are submitted by individual users or user groups in the field of plasmaphysics with ions and lasers. Following periodic calls for proposals, the PHELIX Committee meets approx. once every year; it evaluates the experiment proposals on the basis of scientific merit and technical feasibility, and makes recommendations on the amount of beam time to be allotted.

For information on submission of proposals see: Information for PHELIX users.

For information on beamtime planning and scheduling see: Beamtime Planning at PHELIX.

For information on remaining shifts of approved experiments a database can be searched. Entries are updated after each beam time block.

Call for Proposals

Please note that a 'Call for Proposals' for beamtime at the high-energy/high-power laser PHELIX from May 2018 to April 2019 is open now. Deadline for submission has been prolonged until June 19, 2017. There is also a joined 'Call' for beamtime at GSI's accelerator facilities (G-PAC webpage). 

GSI invites groups working in the fields of atomic physics, plasma physics, extreme matter physics, and laser-particle acceleration to submit research proposals for beamtime at PHELIX. As experimental areas, the stations at PHELIX and Z6 are available. In this call also combined beamtime of PHELIX with ion beam is offered. In total, approx. 170 shifts of PHELIX beamtime can be offered, which correspond to roughly 8 experiments. Experiments granted in this call will run in the above mentioned period after which the granted shifts will expire.


Submission of Proposals

Proposals for the above mentioned period can be submitted to GSI (via the PHELIX Committee) by completing the PPAC webform. Into this webform a maximum 2 MB-pdf file (not exceeding 10 printed pages) should be uploaded, summarizing the scientific justification and relevant technical details for the proposed experiment.  Please contact your GSI contact person for technical questions and feasibility of your planned experiment prior to submitting a proposal, and note that investments necessary for running the experiment cannot be covered by GSI.


Applicants eligible to the European program 'Laserlab Europe' are encouraged to submit their applications additionally through Laserlab Europe for obtaining financial support. Note that the application will be supported through the 4th installment of Laserlab: Laserlab IV. Laserlab IV offers financial support for researchers from Europe and since 2016 for users from non-EU countries to some extent.


Contact persons for the 'Call' are:

Access and support through Laserlab Europe: Bernhard Zielbauer 

Proposal submission and meeting of the PHELIX Committee: Karin Füssel 

Info on Proposal-Structure

Please note that a proposal consists of the following parts: A) the online questionnaire, B) the proposal text itself.

A) Online Questionnaire: Please complete the online webform incl. the supplement on safety aspects and an upload of the proposal itself.

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, Target Station, 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;

Technical Information on the Facility

PHELIX can provide access for laser experiments in the PHELIX hall and alternatively at the Z6 target station. For technical information on the facilities, please refer to the webpage of the PHELIX laser system or contact the respective person responsible for the target station of interest:

PHELIX petawatt target area: B. Zielbauer, C. Brabetz

PHELIX X-ray lab: B. Zielbauer

Z6 target area: A. Blazevic, D. Schumacher 


Details on the laser and laser diagnostics: V. Bagnoud


Current Laser and Experimental parameters

 Laser Energy: the energy of the laser is adjusted depending on the configuration.

  •  In the Laserbay, short pulses with up to 200 J (before compressor) in combination with an f = 40 cm, 45° parabola are available.
  • In the Laserbay, short pulses with up to 100 J (before compressor) in combination with an f =150cm, 90° parabola are available.
  • At Z6, long (1 – 10 ns) pulses with an energy up to 180 J at 527 nm are available with a f=4 m focusing lens. Two phase plates creating top-hat foci of 1 mm or 0.5 mm are available.
  • At Z6, short pulses of 15 J at 1054 nm and a pulse duration of 500 fs are also available but not in parallel with the nanosecond beam (LIGHT Beamline).


Pulse profiles

  •  The pulse duration at PHELIX is 500 fs by default. The pulse duration can be stretched to a few ps with on-line measurement. Above 3 ps, the pulse duration is set and calibrated off-line, but cannot be verified on-line.
  • The temporal contrast of PHELIX is adjustable between 10-7 and 10-10. By default the contrast will be set to10-7. The higher contrast values are obtained with a specific contrast boosting module that represents the cutting edge of laser technology. Because the module is very demanding, it is not a standard parameter and the proposal must explicitly request its use.
  • The combination of the nanosecond and femtosecond can be requested to introduce a fully controllable pedestal. However, the timing jitter between the two frontends will be at least +/- 500 ps.
  • A programmable nanosecond front-end allows pulses of 1 to 15 ns with a deterministic pulse profile with 1 ns resolution.


Multiple beams

  •  It is possible to introduce apertures to create a double beam. In such a case the total energy in both beams equals 100 J.


For call-related technical information on the ion facilities, please see the webpage of G-PAC.



Members of the PHELIX Committee

  • Dr. Brigitte Cros
    CNRS, Lab. de Physique des Gaz et des Plasmas (LPGP), Univ. Paris-Sud, France
  • Prof. Dr. Dirk Gericke 
    University of Warwick, Coventry, United Kingdom
  • Dr. Alexander Golubev
    Institute for Theoretical and Experimental Physics, Moscow, Russia
  • PD Dr. Peter Thirolf (Chair)
    Department of Physics, Ludwig-Maximilians-University Munich, Germany
  • Prof. Dr. Vladimir Tikhonchuk
    University of Bordeaux, Talence, France

PHELIX Committee Secretary

Dr. Karin Füssel

GSI, Darmstadt

Phone: +49-6159-71 1441

Fax: +49-6159-71 2991

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


Next PHELIX Committee Meeting

Date of the next PHELIX Committee Meeting: 14. - 15. August 2017

For the Committee Members to access related documents please see: (link to be established)

Recent Meetings

PHELIX Committee 11 on July 21-22, 2016: documents of the meeting (for PHELIX Committee members only)

PHELIX Committee 10 on September 28, 2015: Agenda PHELIX Committee 10

PHELIX Committee 09 on December 4-5, 2014: Agenda PHELIX Committee 09

PHELIX Committee 08 on March 13-14, 2014: Agenda PHELIX Committee 08; Minutes PHELIX Committee 08;

PHELIX Committee 07 on January 9-10, 2013: Agenda PHELIX Committee 07; Minutes PHELIX Committee 07

PPAC06 on November 17/18, 2011: Agenda PPAC06Minutes PPAC06 

PPAC05 on November 8/9, 2010: Agenda PPAC05, Minutes PPAC05 

PPAC04 on September 29/30, 2009: Agenda PPAC04, Minutes PPAC04

PPAC03 (via E-mail circulation), Winter 2008/09: Agenda PPAC03, Draft Report

PPAC Roadmap Meeting, December 13, 2006: Agenda

PPAC02 on April 3/4, 2006: Agenda PPAC02, Minutes PPAC0

PPAC01 on September 22-24, 2004: Agenda PPAC01, Minutes PPAC01