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HK: Fachverband Physik der Hadronen und Kerne

HK 10: Structure and Dynamics of Nuclei II

HK 10.4: Vortrag

Montag, 20. März 2023, 17:30–17:45, SCH/A215

Implementation of silicon photomultipliers to detect single photons — •Imke Lopp¹, Laura Renth¹, Bernhard Maaß², Patrick Müller¹, Julian Palmes¹, Julien Spahn¹, and Wilfried Nörtershäuser¹ — ¹Institut für Kernphysik, TU Darmstadt, Germany — ²Argonne National Laboratory, Chicago, IL, USA

Precise and sensitive measurements in collinear laser spectroscopy require detectors with a high detection efficiency for single photons. At the same time, the dark count rate of the detector and the generated background, e.g., from scattered light, should be as low as possible. Common systems use a combination of mirrors or lenses and photomultiplier tubes.

We investigated whether silicon photodiodes (SiPMs) are suitable for this application. Due to their square detection area, the photodiodes can be better arranged to cover the optimal detection area than photomultiplier tubes with their circular detection area. Collinear laser spectroscopy on ¹²C⁴⁺ and Sr⁺ ions was used to compare the detectors in the UV and optical region, respectively. Funded by BMBF, contract 05P21RDFN1.