Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Instrumentation IX
HK 27.5: Vortrag
Dienstag, 27. Februar 2018, 18:00–18:15, Audimax H1
Development of the next-generation cryogenic stopping cell for the Super-FRS — •Daler Amanbayev1, Samuel Ayet San Andres1,2, Timo Dickel1,2, Hans Geissel1,2, Ivan Miskun1, Wolfgang R. Plaß1,2, Ann-Kathrin Rink1, and Christoph Scheidenberger1,2 — 1II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Gießen, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
A novel cryogenic gas-filled stopping cell (CSC) is being developed for the Low-Energy Branch (LEB) of the Super-FRS Ion Catcher at FAIR. The CSC will thermalize exotic nuclei produced in the Super-FRS at relativistic energies, and make them available to the high-precision experiments MATS and LaSpec.
A prototype of the CSC – commissioned as a part of the FRS Ion Catcher experiment at GSI – has already enabled an access to short-lived exotic nuclei, providing high areal densities of up to 6.3 mg/cm2, short extraction times of 25 ms, high rate capabilities of more than 104 ions of interest per second and total efficiencies of 30%.
The current design of the future CSC introduces a number of novel concepts that yield in a five-fold increase in areal densities (30 mg/cm2), five times faster extraction (5 ms), and 108 ions per second rate-capability without compromising the efficiency.
The major design features of the future CSC are presented (e.g. RF carpets) with the emphasis on the cryogenic system, that relies on electrically driven cryocoolers. To optimize the cryogenic system, the multiphysics simulations – static and dynamic – were performed.