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

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...

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Autores: Henriques, C.A.O., Freitas, Elisabete D.C., Azevedo, C.D.R., González-Díaz, Diego, Mano, R.D.P., Jorge, M.R., Fernandes, L.M.P., Monteiro, Cristina M.B., Gómez Cadenas, Juan José, Álvarez Puerta, Vicente, Benlloch Rodríguez, J.M., Borges, Filipa I.G.M., Botas, A., Cárcel García, Sara, Carrión, J.V., Cebrián, Susana, Conde, Carlos A.N., Díaz Medina, José, Diesburg, M., Esteve, Raúl, Felkai, R., Ferrario, Paola, Ferreira, Antonio Luis, Goldschmidt, Azriel, Gutiérrez, Rafael María, Hauptman, John M., Hernández, Andrés I., Hernando Morata, J.A., Herrero, Vicente, Jones, Benjamin J.P., Labarga, Luis A., Laing, Andrew, Lebrun, P., Liubarsky, Igor, López-March, N., Losada, Marta, Martín-Albo Simón, Justo, Martínez Lema, Gonzalo, Martínez Pérez, Alberto, McDonald, Alison D., Monrabal Capilla, Francesc, Mora, Francisco José, Moutinho, L.M., Muñoz Vidal, J., Musti, M., Nebot Guinot, Miquel, Novella, P., Nygren, David R., Palmeiro, B., Para, A., Pérez, Javier Martin, Querol, M., Renner, Joshua, Ripoll Masferrer, Lluís, Rodríguez Samaniego, Javier, Rogers, L., Santos, Filomena P., dos Santos, Joaquim M.F., Simón Estévez, Ander, Sofka, C., Sorel, Michel, Stiegler, T., Toledo, J.F., Torrent Collell, Jordi, Tsamalaidze, Zviadi, Veloso, João F.C.A., Webb, R.C., White, James T., Yahlali Haddou, Nadia
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10256/16942
Acceso en línea:http://hdl.handle.net/10256/16942
Access Level:acceso abierto
Palabra clave:Ionització
Ionization
Descripción
Sumario: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/m to 2.5 mm/m, with high impact on the discrimination efficiency 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

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