Study of electron avalanche multiplication in gaseous argon detectors at low pressure and operating at cryogenic temperature

  • Brunetti R
  • Calligarich E
  • Cambiaghi M
 et al. 
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Abstract

We are developing a photodetector sensitive to liquid noble gas scintillation light which is able to operate down to liquid nitrogen temperature (77 K). It has to be a simple, cheap and compact device, with a photocathode surface comparable to that of photomultipliers and it has to be able to produce fast signals for timing and triggering purposes. We studied the possibility of coupling a standard photocathode to a suitable electron multiplication system in gas; this would offer a cheap alternative to the use of photomultipliers. Gas avalanche multiplication at cryogenic temperatures and low pressure was observed in a small prototype chamber. Gains of the order of 103 were obtained in pure argon, while gains up to 105 were achieved using argon/methane mixture in cryogenic environment. © 2006 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Cryogenic detectors
  • Gas avalanche multiplication
  • Liquid argon TPC
  • Photodetectors

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Authors

  • R. Brunetti

  • E. Calligarich

  • M. Cambiaghi

  • C. De Vecchi

  • R. Dolfini

  • A. Menegolli

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