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HK: Fachverband Hadronen und Kerne
HK 19: Accelerators and Instrumentation II
HK 19.5: Talk
Monday, March 16, 2009, 18:00–18:15, H-ZO 90
A cryogenic gas catcher for high energy radioactive ions — •M. Ranjan1, P. Dendooven1, S. Purushothaman1, I. Moore2, H. Penttila2, A. Saastamoinen2, J. Aysto2, W. Plass3, C. Scheidenberger3,4, H. Weick4, J. Neumayr5, P. Thirolf5, and A. Popov6 — 1KVI, University of Groningen, The Netherlands — 2University of Jyvaskyla, Finland — 3Justus Liebig University, Giessen, Germany — 4GSI, Darmstadt, Germany — 5Ludwig Maximilians University, Munich, Germany — 6Petersburg Nuclear Physics Institute, Russia
The Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany, will allow studies of radioactive isotopes using laser techniques and ion traps. For this purpose, we are developing an ion catcher device that will stop high-energy ions from the Super-FRS in helium gas and extract them as a low-energy beam using DC and RF electric fields. The high purity of the helium gas will be ensured by operation at low temperature.
In order to demonstrate a cryogenic system that stops high-energy ions and extracts them as a low-energy beam, a cryogenic ion guide operating at liquid nitrogen temperature has been developed and has been tested at the IGISOL facility in Jyväskylä, Finland. The performance of this simplified prototype at low temperature and using a high-energy ion beam will be discussed. The operational parameters for a cryogenic gas catcher have been analysed defining the electrical and mechanical specifications of the system. A conceptual design of a cryogenic gas catcher will be presented.