The new accelerator facility FAIR is under construction at GSI. Learn more.


Funded by


Accelerator Operations

The GSI Helmholtzzentrum für Schwerionenforschung  operates on its campus in Darmstadt a large, world-wide unique heavy-ion accelerator complex consisting of the UNILAC linear accelerator that accelerates particles from H to U up to 11 MeV/u, the SIS18 synchrotron for further acceleration up to energies of 2 GeV/u, and the experimental storage cooler ring ESR capable of storing and cooling exotic and highly-charged ions at energies from 4 MeV/u to 0.5 GeV/u . In the last two years, a further storage cooler ring – CRYRING, the Swedish in-kind contribution to FAIR from Stockholm University – has been installed behind the ESR, for atomic and nuclear physics experiments at lower energies of about 15 MeV/u down to a few 100 keV/u. In addition to proton and ion beams, pion beams can be provided at GSI in a momentum range from 0.5 to 2.5 GeV/c.

Division Head




Prof. Dr. Mei Bai


BR3 2.166

Accelerator Project Office




Function in the division

Dr. Udo Weinrich


BR3 2.165

Deputy of the division head;

Planning and controlling of the division budget

Staff of the division head - administrative
Group contact: sekr-acc@gsi.de




Function in the division


SE2 2.170

Contact person for human resources



--> temporary contact: Annette Mattil & Heidi Martinez

Larissa Birli


C26 1.010

Secretary of the departments; Web pages/external presentation



Fax: -2987


BR3 2.167c

Assistant of the division head;

Coordination of appointments;

Support and controlling of the division budget;

Organization of the department heads meeting,

workshops and conferences;

General administrative support


--> temporary contact: Larissa Birli & Josefine Stein

Heidi Martinez



Fax: -2987

BR3 2.167c

Secretary of the division head;

Support of personnel requests

Annette Mattil


SE2 2.170

Secretary of the departments

Josefine Stein


C26 1.010

Secretary of the departments;

Contact person for one-call-services;

Contact person for the office space requests