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 dedicated 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 construction and test of a cryocatcher prototype at GSI is a workpackage of the EU-FP7 project COLMAT. A prototype catcher including cryostat will be set-up at GSI to perform measurements with heavy ion beams of the heavy ion synchrotron SIS18.