Gießen 2024 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Poster

HK 72.28: Poster

Thursday, March 14, 2024, 17:15–18:45, HBR 14: Foyer

Cooling of silicon photomultipliers for collinear laser spectroscopy using Peltier elements — •Aaron Flaig, Bernhard Maaß, Wilfried Nörtershäuser, Julian Palmes, and Laura Renth — Institut für Kernphysik, TU Darmstadt, Germany

Collinear laser spectroscopy requires single photon detection with high efficiencies. Typically, photomultiplier tubes (PMTs) are used for this purpose. Compared to this classical approach, silicon photomultipliers (SiPMs) offer many benefits. Due to their small size and square layout they can be tiled closely together into a desired shape and they can be operated directly in a vacuum and in strong magnetic fields. At room temperature, SiPMs have a dark count rate which is too high for single photon detection, however, this can be overcome by cooling the SiPMs to very low (< -40 °C) temperatures.

In order to reach such temperatures, the possibility of cooling SiPMs using Peltier elements in combination with a liquid cooling system is investigated. The performance of the new detection system for collinear laser spectroscopy is tested by performing spectroscopy on stable Strontium ions at the KOALA beamline at TU Darmstadt. The results are compared to measurements simultaneously performed with PMTs. Funded by BMBF, contract 05P21RDFN1.

Keywords: silicon photomultiplier; laser spectroscopy