Development of a Cryocatcher Prototype for SIS100

The main synchrotron SIS100 of the FAIR-facility will be operated with high-intensity intermediate charge state heavy ion beams. In order to assure reliable operation with intermediate charge states, a special synchrotron design, including a catcher system for ionized beam ions had to be developed. Intermediate charge state heavy ions suffer from high cross sections for ionization. Due to the ded- icated synchrotron layout, ions which have been further stripped by collisions with residual gas atoms are caught by the ion catcher system in the cryogenic arcs. The con- struction and test of a cryocatcher prototype at GSI is a workpackage of the EU-FP7 project COLMAT. A proto- type catcher including cryostat will be set-up at GSI to per- form measurements with heavy ion beams of the heavy ion synchrotron SIS18.