Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 15: Poster I
A 15.10: Poster
Dienstag, 12. März 2024, 17:00–19:00, Tent A
Trap-integrated fluorescence detection with silicon photomultipliers for sympathetic laser cooling in a cryogenic Penning trap — •Markus Wiesinger1, Florian Stuhlman2, Matthew Bohman1, Peter Micke1,3, Christian Will1, Hüseyin Yildiz2, Fatma Abbass2, Bela Arndt1,4,5, Jack Devlin3,5, Stefan Erlewein1,5, Markus Fleck5,6, Julia Jäger1,3,5, Barbara Latacz3,5, Daniel Schweitzer2, Gilbertas Umbrazunas5,7, Elise Wursten3,5, Klaus Blaum1, Yasuyuki Matsuda6, Andreas Mooser1, Wolfgang Quint4, Anna Soter7, Jochen Walz2,8, Christian Smorra2,5, and Stefan Ulmer5,9 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Institut für Physik, Johannes Gutenberg-Universität Mainz — 3CERN, Meyrin, Switzerland — 4GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — 5RIKEN Fundamental Symmetries Laboratory, Japan — 6Graduate School of Arts and Sciences, University of Tokyo, Japan — 7Eidgenössische Technische Hochschule Zürich, Switzerland — 8Helmholtz-Institut Mainz — 9Heinrich-Heine-Universität Düsseldorf
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPM) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning-trap system. Our approach enables fluorescence detection in a hermetically-sealed cryogenic Penning-trap chamber with limited optical access, where state-of-the-art detection using a telescope and photomultipliers at room temperature would be extremely difficult. We characterize the properties of the SiPM in a cryocooler at 4 K, where we measure a dark count rate below 1/s and a detection efficiency of 2.5(3) %. We further discuss the design of our cryogenic fluorescence-detection trap, and analyze the performance of our detection system by fluorescence spectroscopy of 9Be+ ion clouds during several runs of our sympathetic laser-cooling experiment.
Keywords: silicon photomultiplier; Penning trap; laser cooling; fluorescence detection; sympathetic cooling