Construction and Test of a Cryocatcher Prototype for SIS100

The main accelerator SIS100 of the FAIR-complex will provide heavy ion beams of highest intensities. Beam loss due to ionization is the most demanding loss mechanism at operation with high intensity, intermediate charge state heavy ions. A special synchrotron design has been devel- oped for SIS100, aiming for hundred percent control of ion- ization beam loss by means of a dedicated cryogenic ion catcher system. To suppress dynamic vacuum effects, the cryo catcher system shall provide a significantly reduced effective desorption yield. The construction and test of a prototype cryocatcher is a task of the EU-FP-7 workpack- age COLMAT. A prototype test setup, including cryostat has been constructed, manufactured and tested under real- istic conditions with beams from the heavy ion synchrotron SIS18. The design and results are presented.