Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Instrumentation VI
HK 21.3: Vortrag
Dienstag, 11. März 2025, 16:30–16:45, SR Exp1B Chemie
Use of microchannel plate detectors for beam tracking at FAIR: test experiment at the Cologne FN Tandem accelerator — •Dennis Bittner1, Gregor Košir2, Christoph Fransen1, Jan Jolie1, Klemen Žagar2, Matjaž Skobe2, Matjaž Vencelj2, Calum Jones3, Kathrin Wimmer3, Jelena Vesić2, and Magdalena Górska3 — 1IKP, Cologne, Germany — 2Jožef Stefan Institute, Ljubljana, Slovenia — 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
At FAIR/GSI, radioactive ion beams of energies of hundreds of MeV/nucleon are available. To perform the low-energy Coulomb excitation experiments, the beams need to be slowed down with a thick degrader. Secondary reactions and scattering within the degrader result in a beam containing many secondary reaction products and a wide angular spread. For the experiments, it is crucial to know the position and momentum vector of the single ions. The approach is to place two foil-MCP (Micro Channel Plate) detectors with delay lines will be placed to obtain position sensitivity. The ions passing the foils generate secondary electrons, which are accelerated towards the MCP. Due to the large distance between the foil and the MCP, permanent magnets are used to force the electrons on circular trajectories. A test experiment of the full particle tracking detector setup was conducted at the 10 MV FN-Tandem accelerator in Cologne. The first results of this experiment will be presented and the further outlook will be discussed. Support by BMBF is acknowledged under ErUM Verbundprojekt 05P2024 (ErUM-FSP T07). Grant 05P21PKFN1.
Keywords: MCP; FAIR; TOF; BPM