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Abstract: Oscura is a proposed multi-kg skipper-CCD experiment designed for a dark matter (DM) direct detection search that will reach unprecedented sensitivity to sub-GeV DM-electron interactions with its 10 kg detector array. Oscura is planning to operate at SNOLAB with 2070 m overburden, and aims to reach a background goal of less than one event in each electron bin in the 2-10 electron ionization-signal region for the full 30 kg-year exposure, with a radiation background rate of 0.01 dru.[1 dru (differential rate unit) corresponds to 1 event/kg/day/keV.] In order to achieve this goal, Oscura must address each potential source of background events, including instrumental backgrounds. In this work, we discuss the main instrumental background sources and the strategy to control them, establishing a set of constraints on the sensors' performance parameters. We present results from the tests of the first fabricated Oscura prototype sensors, evaluate their performance in the context of the established constraints and estimate the Oscura instrumental background based on these results.
Fuente: Journal of Instrumentation, 2023, 18(8), P08016
Editorial: Institute of Physics
Fecha de publicación: 01/08/2023
Nº de páginas: 23
Tipo de publicación: Artículo de Revista
DOI: 10.1088/1748-0221/18/08/P08016
ISSN: 1748-0221
Url de la publicación: https://doi.org/10.1088/1748-0221/18/08/P08016
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CERVANTES-VERGARA, BRENDA A.
PEREZ, SANTIAGO
ESTRADA, JUAN
BOTTI, ANA
CHAVEZ, CLAUDIO R.
CHIERCHIE, FERNANDO
SAFFOLD, NATHAN
AGUILAR-AREVALO, ALEXIS
ALCALDE-BESSIA, FABRICIO
AVALOS, NICOLÁS
BAEZ, OSCAR
BAXTER, DANIEL
BERTOU, XAVIER
BONIFAZI, CARLA
CANCELO, GUSTAVO
NURIA CASTELLÓ MOR
CHAVARRIA, ALVARO E.
DE EGEA, JUAN MANUEL
AGUSTIN LANTERO BARREDA
ROCIO VILAR CORTABITARTE
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