Welcome to the UNILAC Post Stripper Upgrade (PSU) Department

In July 2019 the LINAC department has been renamed to "UNILAC post-Stripper Upgrade" department. This step has been triggered by the council decision to replace the existing post-stripper drift tube linac (DTL), being operational since the mid 1970ies, by a completely new section. Replacing the DTL section thus became a top priority task and focus of the department, now being reflected properly through its name.

The post-stripper DTL provides acceleration of the ions after they have been stripped in the gaseous stripper. The DTL is 55 meters long and comprises five accelerating cavities, each of them having a diameter of about two meters and consuming up to two Megawatt of radio-frequency power. Acceleration is from 5% to 15% of the velocity of light. The new DTL will be based (as the today's one) on cavities of the Alvarez-type in order to provide the high beam quality required by FAIR. The name of the new DTL is ALVAREZ 2.0.

Department Head

Dr. Lars Groening

Email: La.Groening(at)gsi.de
Tel: 06159-71-2344
Loc: BR1.2.138

Department Head (Deputy)

Dr. Sascha Mickat

Email: S.Mickat.(at)gsi.de
Tel: 06159-71-1600
Loc: BR1.2.137


May 2nd

April 24th

March 2nd

March 2nd

February 23rd



























delivery of roots pump for hydrogen stripper

factory acceptance test of roots pump for hydrogen stripper

production of explosion-save roots pump station for hydogen stripper

delivery of dummy cavity for re-commissioning of galvanic workshop

production status of cavity sections AI-1 and AI-2