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Scintillation detectors with silicon photomultiplier readout in a dilution refrigerator at temperatures down to 0.2 K by Zhang, J.; Goeldi, D.; Iwai, R.; Sakurai, M.; Soter, A. is a scholarly article available to read on EtoBox.

What is Scintillation detectors with silicon photomultiplier readout in a dilution refrigerator at temperatures down to 0.2 K about?

We are developing a novel high-brightness atomic beam, comprised of a two-body exotic atom called muonium (M $ = \mu^+ + e^-$), for next-generation atomic physics and gravitational interaction measurements. This M source originates from a thin sheet of superfluid helium (SFHe), hence diagnostics and later measurements require a detection system which is operational in a dilution cryostat at temperatures below 1 K. In this paper, we describe the operation and characterization of silicon photomultipliers (SiPMs) at ultra-low temperatures in SFHe targets. We show the temperature dependence of the signal shape, breakdown voltage, and single photon detection efficiency, concluding that single photon detection with SiPMs below 0.85 K is feasible. Furthermore, we show the development of segmented scintillation detectors, where 16 channels at 1.7 K and one channel at 170 mK were commissioned using a muon beam.

Author

Zhang, J.; Goeldi, D.; Iwai, R.; Sakurai, M.; Soter, A.

Published

2022

Language

EN