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The DAMIC-M Low Background Chamber

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arxiv 2407.17872 v2 pith:FSGQNHA3 submitted 2024-07-25 physics.ins-det astro-ph.CO

classification physics.ins-detastro-ph.CO
keywords damic-mdarkccdsmatterbackgroundbeenchamberdata
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The DArk Matter In CCDs at Modane (DAMIC-M) experiment is designed to search for light dark matter (m$_{\chi}$<10\,GeV/c$^2$) at the Laboratoire Souterrain de Modane (LSM) in France. DAMIC-M will use skipper charge-coupled devices (CCDs) as a kg-scale active detector target. Its single-electron resolution will enable eV-scale energy thresholds and thus world-leading sensitivity to a range of hidden sector dark matter candidates. A DAMIC-M prototype, the Low Background Chamber (LBC), has been taking data at LSM since 2022. The LBC provides a low-background environment, which has been used to characterize skipper CCDs, study dark current, and measure radiopurity of materials planned for DAMIC-M. It also allows testing of various subsystems like readout electronics, data acquisition software, and slow control. This paper describes the technical design and performance of the LBC.

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