Skipper-CCD sensors for the Oscura experiment: requirements and preliminary tests

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...

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Detalles Bibliográficos
Autores: 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, Castelló Mor, Núria|||0000-0002-6126-243X, Chavarria, Alvaro E., De Egea, Juan Manuel, Lantero Barreda, Agustín, Vilar Cortabitarte, Rocío|||0000-0003-2045-8054
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/32446
Acceso en línea:https://hdl.handle.net/10902/32446
Access Level:acceso abierto
Palabra clave:Dark Matter detectors (WIMPs, axions, etc.)
Photon detectors for UV, visible and IR photons (solid-state) (PIN diodes, APDs, Si-PMTs, G-APDs, CCDs, EBCCDs, EMCCDs, CMOS imagers, etc)
Solid state detectors
Very low-energy charged particle detectors
Descripción
Sumario: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.

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