CE31 - Physique subatomique et astrophysique

Cryogenic detectors with single-electron sensitivity for Dark Matter searches – CRYOSEL

Submission summary

The objective of the CRYOSEL proposal is to develop and exploit a massive (30 g) cryogenic Ge detector sensitive to the single electron-hole pair, in order to search for the interaction of light Dark Matter particles with electrons (ER) or nuclei (NR). A resolution of 0.1 pair is obtained by the Luke-Neganov amplification of the thermal signal associated to the drift of the charges in the detector. The background of purely thermal signals (not associated with ionization) is rejected by requiring a coincidence with the detection of at least one electron in an array of superconducting lines covering a surface of the crystal. The detector will be used in the low-radioactivity environment of the LSM to search for ER-induced DM signals in the 0.1 to 100 MeV/c2 mass range and NR-induced signals for range from 0.1 to 1 GeV/c2. A laser-pulse injection system and an AmBe neutron source will be used for the calibration of the response to single-electron and nuclear recoil events, respectively.

Project coordinator

Monsieur Jules Gascon (Institut de Physique des 2 Infinis de Lyon)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

IRFU Institut de Recherche sur les lois Fondamentales de l'Univers
IJCLab Laboratoire de physique des 2 infinis – Irène Joliot-Curie
IP2I Lyon Institut de Physique des 2 Infinis de Lyon

Help of the ANR 550,651 euros
Beginning and duration of the scientific project: December 2021 - 36 Months

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