Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 64: Instrumentation
HK 64.2: Talk
Friday, March 23, 2012, 14:30–14:45, P 2
Simulations of the new cryogenic gas filled stopping cell for the low energy branch of the Super-FRS at FAIR — •Moritz Pascal Reiter1, Timo Dickel1,2, Wolfgang Plass1,2, Hans Geisel1,2, Daniel Schäfer1, and Christoph Scheidenberger1,2 — 1Justus-Liebig-University, Giessen — 2GSI, Darmstadt
At the low energy branch of the Super-FRS at FAIR exotic nuclei will be produced at relativistic energies, slowed down, thermalized and provided as a low energy beam to high precision experiments. The ions are stopped in a cryogenic stopping cell in high density helium gas.
In order to guide the development of the new cryogenic stopping cell and to study the performance of the new techniques used, numerical simulations of the stopping cell have been performed. A parameter study of the RF carpet has been done and optimized working parameters for the stopping cell have been found. The simulation results show good agreement with the first offline and online experiments of the cryogenic stopping cell obtained at the FRS Ion Catcher at GSI. For the first time cryogenic operation of a stopping cell with a radio frequency carpet and hitherto unreached helium densities have been demonstrated.