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Electroluminescence TPCs at the thermal diffusion limit by Henriques, C. A. O.; Monteiro, C. M. B.; González-Díaz, D.; Azevedo, C. D. R; Freitas, E. D. C.; Mano, R. D. P.; Jorge, M. R.; Fernandes, A. F. M.; Gómez-Cadenas, J. J.; Fernandes, L. M. P.; Adams, C.; Álvarez, V.; Arazi, L.; Bailey, K.; Ballester, F.; Benlloch-Rodríguez, J. M.; Borges, F. I. G. M.; Botas, A.; Cárcel, S.; Carrión, J. V.; Cebrián, S.; Conde, C. A. N.; Díaz, J.; Diesburg, M.; Escada, J.; Esteve, R.; Felkai, R.; Ferrario, P.; Ferreira, A. L.; Generowicz, J.; Goldschmidt, A.; Guenette, R.; Gutiérrez, R. M.; Hafidi, K.; Hauptman, J.; Hernandez, A. I.; Morata, J. A. Hernando; Herrero, V.; Johnston, S.; Jones, B. J. P.; Kekic, M.; Labarga, L.; Laing, A.; Lebrun, P.; López-March, N.; Losada, M.; Martín-Albo, J.; Martínez, A.; Martínez-Lema, G.; McDonald, A.; Monrabal, F.; Mora, F. J.; Vidal, J. Muñoz; Musti, M.; Nebot-Guinot, M.; Novella, P.; Nygren, D. R.; Palmeiro, B.; Para, A.; Pérez, J.; Psihas, F.; Querol, M.; Renner, J.; Repond, J.; Riordan, S.; Ripoll, L.; Rodríguez, J.; Rogers, L.; Romo-Luque, C.; Santos, F. P.; Santos, J. M. F. dos; Simón, A.; Sofka, C.; Sorel, M.; Stiegler, T.; Toledo, J. F.; Torrent, J.; Veloso, J. F. C. A.; Webb, R.; White, J. T.; Yahlali, N. is a scholarly article available to read on EtoBox.

What is Electroluminescence TPCs at the thermal diffusion limit about?

The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the ${}^{136}$Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. However, it is limited by the diffusion of electrons. It is known that the addition of a small fraction of a molecular gas to xenon reduces electron diffusion. On the other hand, the electroluminescence (EL) yield drops and the achievable energy resolution may be compromised. We have studied the effect of adding several molecular gases to xenon (CO${}_{2}$, CH${}_{4}$ and CF${}_{4}$) on the EL yield and energy resolution obtained in a small prototype of driftless gas proportional scintillation counter. We have compared our results on the scintillation characteristics (EL yield and energy resolution) with a microscopic simulation, obtaining the diffusion coefficients in those conditions as well. Accordingly, electron diffusion may be reduced from about 10 mm/$\sqrt{\mathrm{m}}$ for pure xenon down to 2.5 mm/$\sqrt{\mathrm{m}}$ using additive concentrations of about 0.05%, 0.2% and 0

Author

Henriques, C. A. O.; Monteiro, C. M. B.; González-Díaz, D.; Azevedo, C. D. R; Freitas, E. D. C.; Mano, R. D. P.; Jorge, M. R.; Fernandes, A. F. M.; Gómez-Cadenas, J. J.; Fernandes, L. M. P.; Adams, C.; Álvarez, V.; Arazi, L.; Bailey, K.; Ballester, F.; Benlloch-Rodríguez, J. M.; Borges, F. I. G. M.; Botas, A.; Cárcel, S.; Carrión, J. V.; Cebrián, S.; Conde, C. A. N.; Díaz, J.; Diesburg, M.; Escada, J.; Esteve, R.; Felkai, R.; Ferrario, P.; Ferreira, A. L.; Generowicz, J.; Goldschmidt, A.; Guenette, R.; Gutiérrez, R. M.; Hafidi, K.; Hauptman, J.; Hernandez, A. I.; Morata, J. A. Hernando; Herrero, V.; Johnston, S.; Jones, B. J. P.; Kekic, M.; Labarga, L.; Laing, A.; Lebrun, P.; López-March, N.; Losada, M.; Martín-Albo, J.; Martínez, A.; Martínez-Lema, G.; McDonald, A.; Monrabal, F.; Mora, F. J.; Vidal, J. Muñoz; Musti, M.; Nebot-Guinot, M.; Novella, P.; Nygren, D. R.; Palmeiro, B.; Para, A.; Pérez, J.; Psihas, F.; Querol, M.; Renner, J.; Repond, J.; Riordan, S.; Ripoll, L.; Rodríguez, J.; Rogers, L.; Romo-Luque, C.; Santos, F. P.; Santos, J. M. F. dos; Simón, A.; Sofka, C.; Sorel, M.; Stiegler, T.; Toledo, J. F.; Torrent, J.; Veloso, J. F. C. A.; Webb, R.; White, J. T.; Yahlali, N.

Published

2018

Language

EN