One cryogenic collimator, tested with beam

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 developed for SIS100, aiming for hundred percent control of ionization beam loss by means of a dedicated cryogenic ion catcher system. To suppress dynamic vacuum effects, the cryocatcher system shall provide a significantly reduced effective desorption yield. The construction and test of a prototype cryocatcher is a task of the EuCARD WP8 ColMat. A prototype test setup, including cryostat has been constructed, manufactured and tested under realistic conditions with beams from the heavy ion synchrotron SIS18. The design and results are presented.