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First measurement of Gallium Arsenide as a low-temperature calorimeter

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arxiv 2404.15741 v1 pith:W3UQGVX7 submitted 2024-04-24 hep-ex physics.ins-det

D. L. Helis , A. Melchiorre , A. Puiu , G. Benato , P. Carniti , A. Continenza , N. Di Marco , A. Ferella
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C. Ferrari F. Giannesi C. Gotti E. Monticone L. Pagnanini G. Pessina S. Pirro G. Profeta M. Rajteri P. Settembri A. Shaikina C.Tresca D. Trotta
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classification hep-exphysics.ins-det
keywords darkdetectionmatterarsenidecalorimetercrystalfirstgaas
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In this paper, we present the first measurement of a Gallium Arsenide crystal working as low-temperature calorimeter for direct Dark Matter (DM) searches within the DAREDEVIL (DARk-mattEr DEVIces for Low energy detection) project. In the quest for direct dark matter detection, innovative approaches to lower the detection thershold and explore the sub-GeV mass DM range, have gained high relevance in the last decade. This study presents the pioneering use of Gallium Arsenide (GaAs) as a low-temperature calorimeter for probing the dark matter-electron interaction channel. Our experimental setup features a GaAs crystal at ultralow temperature of 15 mK, coupled with a Neutron Transmutation Doped (NTD) thermal sensor for precise energy estimation. This configuration is the first step towards the detection of single electrons scattered by dark matter particles within the GaAs crystal, to significantly improve the sensitivity to low-mass dark matter candidates.

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  1. COSINUS -- a model-independent challenge of the DAMA/LIBRA dark matter claim with cryogenic NaI detectors operated in a new low-background facility

    physics.ins-det 2025-07 conditional novelty 4.0 of 10

    COSINUS presents the detector design, facility status, and projected sensitivity of a cryogenic NaI experiment intended to test the DAMA/LIBRA dark matter claim with event-by-event particle discrimination.

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