Helium–Xenon mixtures to improve the topological signature in high pressure gas xenon TPCs

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

Research output: Contribution to journalArticlepeer-review


Within the framework of xenon-based double beta decay experiments, we propose the possibility to improve the background rejection of an electroluminescent Time Projection Chamber (EL TPC) by reducing the diffusion of the drifting electrons while keeping nearly intact the energy resolution of a pure xenon EL TPC. Based on state-of-the-art microscopic simulations, a substantial addition of helium, around 10 or 15 %, may reduce drastically the transverse diffusion down to 2.5 mm/m from the 10.5 mm/m of pure xenon. The longitudinal diffusion remains around 4 mm/m. Light production studies have been performed as well. They show that the relative variation in energy resolution introduced by such a change does not exceed a few percent, which leaves the energy resolution practically unchanged. The technical caveats of using photomultipliers close to an helium atmosphere are also discussed in detail.

Original languageEnglish (US)
Pages (from-to)82-90
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
StatePublished - Oct 11 2018


  • Double-beta decay
  • Electroluminescence
  • Helium
  • Low diffusion
  • TPC
  • Xenon

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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