Parametrization of high light yield, energy resolution, and optical cross-talk in SiPM-based liquid argon detectors

A. Moharana, C. Galbiati, S. Horikawa, P. Kachru, I. Kochanek, K. Kondo, A. Razeto

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Liquefied noble gases are widely used as detector media in various physics experiments owing to their high scintillation efficiency and ease of scalability to large volumes. Now-a-days, these experiments are gradually shifting to SiPM-based readouts because of their high photon detection efficiency, superior resolution, and relative ease of use. However, SiPMs emit photons during the avalanche process, known as optical cross-talk, which can significantly affect the measured signal. In this work, we present two small single-phase liquid argon chambers equipped with SiPM arrays. They display high gross light yields up to 32 photo-electrons per keV, with ∼12 attributed to primary photo-electrons generated by scintillation photons. We then present the full parametrization of the over-voltage dependence of the light yield, energy resolution, and optical cross-talk, based on dedicated measurements of optical cross-talk components and a simple analytical model.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Keywords

  • Cross-talk
  • Light yield
  • Liquid argon detector
  • SiPM

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