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A: Fachverband Atomphysik

A 22: Poster Session - Atomic Physics III

A 22.28: Poster

Mittwoch, 11. März 2020, 16:00–18:00, Empore Lichthof

Development of a detector to register low-energy, charge-changed ions from ionization experiments at CRYRING@ESR — •Alexander Borovik Jr.¹, Günter Weber^2,3, Vinzenz Hilbert^2,3, Haifeng Lin^2,3, Philip Pfäfflein^2,3,4, Binghui Zhu^2,3, Christoph Hahn^2,3,4, Michael Lestinsky⁴, Stefan Schippers¹, Thomas Stöhlker^2,3,4, and Jan Rothhardt^2,3 — ¹Justus-Liebig-Universität Gießen, 35392 Giessen, Germany — ²Helmholtz-Institut Jena, 07743 Jena, Germany — ³Friedrich Schiller University, 07743 Jena, Germany — ⁴GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany

In the frame of the proof-of-principle experiment on photoionization of the stored C⁺ ions by XUV laser pulses, a specially tailored detector setup has been developed for counting product ions. These hit the YAP:Ce scintillator plate producing light pulses which are registered by an array of silicon photomultipliers (SiPMs) placed on a custom-made interface board in a pocket tube outside of the vacuum. The detector can reliably operate in strong magnetic field and thus can be put directly inside the chamber of a dipole magnet. The developed array of mechanical actuators enables the detector’s fine positioning to match the given product-ion trajectory, as well as the swift periodical retraction out of the product-ion trajectory area to avoid its unnecessary irradiation and possible primary-ion losses during the ion-beam preparation procedure. This detector enables a variety of photoionization experiments with stored highly-charged ions.