Secondary scintillation yield of xenon with sub-percent levels of CO2 additive for rare-event detection

[EN] Xe-CO2 mixtures are important alternatives to pure xenon in Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification with applications in the important field of rare event detection such as directional dark matter, double electron capture and do...

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Detalles Bibliográficos
Autores: HENRIQUES, C.A., Freitas, E.D.C., Azevedo, C.D.R., González-Díaz, D., Mano, R.D.P., Jorge, M.R., Fernandes, L.M.P., Monteiro, C.M.B., Gómez-Cadenas, J.J., Benlloch-Rodríguez, J.M., Borges, F.I.G.M., Botas, A., Cárcel García, Sara, Carrión Burguete, José Vicente, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, Álvarez-Puerta, Vicente|||0000-0001-6938-8259, Esteve Bosch, Raul|||0000-0002-1289-6938, Herrero Bosch, Vicente|||0000-0003-0860-2789, Mora Mas, Francisco José|||0000-0003-2281-9546, Toledo Alarcón, José Francisco|||0000-0002-9782-4510
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/148454
Acceso en línea:https://riunet.upv.es/handle/10251/148454
Access Level:acceso abierto
Palabra clave:Double beta decay
Neutrino
Rare event detection
Electroluminescence
Secondary scintillation
Xenon
TECNOLOGIA ELECTRONICA
Descripción
Sumario:[EN] Xe-CO2 mixtures are important alternatives to pure xenon in Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification with applications in the important field of rare event detection such as directional dark matter, double electron capture and double beta decay detection. The addition of CO2 to pure xenon at the level of 0.05-0.1% can reduce significantly the scale of electron diffusion from 10 mm/root m to 2.5 mm/root m, with high impact on the discrimination of the events through pattern recognition of the topology of primary ionization trails. We have measured the electroluminescence (EL) yield of Xe-CO2 mixtures, with sub-percent CO2 concentrations. We demonstrate that the EL production is still high in these mixtures, 70% and 35% relative to that produced in pure xenon, for CO2 concentrations around 0.05% and 0.1%, respectively. The contribution of the statistical fluctuations in EL production to the energy resolution increases with increasing CO2 concentration, being smaller than the contribution of the Fano factor for concentrations below 0.1% CO2. (C) 2017 The Author. Published by Elsevier B.V.

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