JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Bozyk, L.H.J. AU - Aumüller, S. AU - Spiller, P.J. ED - Herfurth, Frank ED - Schaa, Volker RW TI - Cryogenic Surfaces in a Room Temperature SIS18 Ioncatcher J2 - Proc. of HIAT2022, Darmstadt, Germany, 27 June-01 July 2022 CY - Darmstadt, Germany T2 - International Conference on Heavy Ion Accelerator Technology T3 - 15 LA - english AB - For FAIR operation, the existing heavy ion synchrotron SIS18 at GSI will be used as booster for the future SIS100. In order to reach the intensity goals, medium charge state heavy ions will be used. Unfortunately, such ions have very high ionization cross sections in collisions with residual gas particles, yielding in beam loss and a subsequent pressure rise via ion impact stimulated gas desorption. To reduce the desorption yield, room temperature ioncatcher have been installed, which provide low desorption surfaces. Simulations including cryogenic surfaces show, that their high sticking probability prevents the vacuum system from pressure built-ups during operation. Such, the operation with heavy ion beams can be stabilized at higher heavy ion intensities, than solely with room temperature surfaces. A prototype ioncatcher containing cryogenic surfaces has been developed and built. The surfaces are cooled by a commercial coldhead, which easily allows this system being integrated into the room temperature synchrotron. The development and first laboratory tests including fast pressure measurements of this system will be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 79 EP - 82 KW - vacuum KW - cryogenics KW - heavy-ion KW - simulation KW - operation DA - 2022/08 PY - 2022 SN - 2673-5547 SN - 978-3-95450-240-0 DO - doi:10.18429/JACoW-HIAT2022-TUP06 UR - https://jacow.org/hiat2022/papers/tup06.pdf ER -