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Title: Background reduction of a spherical gaseous detector

The Spherical gaseous detector (or Spherical Proportional Counter, SPC) is a novel type of detector. It consists of a large spherical volume filled with gas, using a single detection readout channel. The detector allows 100 % detection efficiency. SEDINE is a low background version of SPC installed at the Laboratoire Souterrain de Modane (LSM) underground laboratory (4800 m.w.e) looking for rare events at very low energy threshold, below 100 eV. This work presents the details on the chemical cleaning to reduce internal {sup 210}Pb surface contamination on the copper vessel and the external radon reduction achieved via circulation of pure air inside anti-radon tent. It will be also show the radon measurement of pure gases (Ar, N, Ne, etc) which are used in the underground laboratory for the low background experiments.
Authors:
 [1] ; ;  [2] ; ; ; ; ;  [3] ;  [4]
  1. Laboratoire Souterrain de Modane, France ali.dastgheibi-fard@lsm.in2p3.fr (France)
  2. Laboratoire Souterrain de Modane (France)
  3. CEA Saclay - IRFU/SEDI - 91191 Gif sur Yvette (France)
  4. Aristotle University of Thessaloniki (Greece)
Publication Date:
OSTI Identifier:
22488711
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1672; Journal Issue: 1; Conference: LRT 2015: 5. international workshop in low radioactivity techniques, Seattle, WA (United States), 18-20 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ARGON; CLEANING; COPPER; EFFICIENCY; EV RANGE; LEAD 210; NEON; NITROGEN; PROPORTIONAL COUNTERS; RADON; READOUT SYSTEMS; REDUCTION; SPHERICAL CONFIGURATION; SURFACE CONTAMINATION; UNDERGROUND