München 2019 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 52: Instrumentation XI, Accelerators and Applications
HK 52.3: Talk
Thursday, March 21, 2019, 14:45–15:00, HS 11
Upgrade of the FRS Ion Catcher RFQ beamline — •Lizzy Gröf1, Daler Amanbayev1, Samuel Ayet1,2, Sönke Beck2, Julian Bergmann1, Timo Dickel1,2, Hans Geissel1,2, Florian Greiner1, Christine Hornung1, Jennifer Koch2,3, Israel Mardor4,5, Ivan Miskun1, Wolfgang Plaß1,2, and Christoph Scheidenberger1,2 — 1Justus-Liebig Universität Gießen, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 3Beuth Hochschule für Technik, Berlin, Germnay — 4Soreq NRC, Yavne, Israel — 5Tel Aviv University, Israel
At the FRS Ion Catcher at GSI high precision mass measurements of thermalized exotic nuclei can be performed. Projectile and fission fragments are produced at the FRS at relativistic energies, seperated in-flight and slowed-down and thermalized in a cryogenic stopping cell (CSC). The FRS Ion Catcher consists of three main parts, the CSC, an RFQ beamline and a multiple-reflection time-of-flight mass-spectrometer (MR-TOF-MS). The RFQ beamline connects the CSC and the MR-TOF-MS. Its upgrade includes new features, for example a Laser Ablation Carbon Cluster Ion Source (LACCI). It can provide ions for calibration over a broad mass range with masses close to the ions of interest and is ideally suited for the requirements of MR-TOF-MS. Another part of the upgrade is an RFQ mass filter, which allows an additional stage of mass selection before the ions reach the MR-TOF-MS. Futhermore the upgrade improves the differential pumping of the system, which leads to a higher stopping efficiency. The RFQ beamline and its upgrade will be presented.