skip to main content

SciTech ConnectSciTech Connect

Title: BiPo: A dedicated radiopurity detector for the SuperNEMO experiment

New generation experiments in Astroparticle Physics need to operate in really restrictive background conditions, which implies the use of high radiopure materials for the experimental setup construction. For this reason the screening of the materials with enough sensitivity has become a challenge that sometimes cannot be afforded with standard techniques like Germanium detector spectroscopy. BiPo is a dedicated detector, that operates in the Canfranc Underground Laboratory, designed to measure the radiopurity, mainly of the ββ sources of the SuperNEMO experiment, by the detection of BiPo events. It is composed of two modules with 40 optical lines each one, registering the energy and the time of the emitted particles. The well known features of the BiPo events (delayed coincidence between an electron and an alpha particle) facilitate the discrimination of other background events that could entangle the expected signal. In addition, the geometry of the detector, with an active area of around 3.6 m{sup 2}, has been optimized to reach the necessary sensitivity levels for the SuperNEMO source foils in the shortest time possible. Preliminary results of background measurements and calibrations taken since summer 2012 shows that the required sensitivity for the measurements of the source foils could be reached inmore » few months. Routine measurements of samples are already started being an important point for the SuperNEMO source foils construction.« less
Authors:
 [1] ; ;
  1. Laboratoire de l'Accélérateur Linéaire. Centre Scientifique d'Orsay. Bâtiment 200 - BP 34. 91898 ORSAY Cedex (France)
Publication Date:
OSTI Identifier:
22218206
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1549; Journal Issue: 1; Conference: LRT 2013: 4. international workshop on low radioactivity techniques, Assergi (Italy), 10-12 Apr 2013; Other Information: (c) 2013 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; ALPHA DETECTION; ALPHA PARTICLES; CALIBRATION; COINCIDENCE SPECTROMETRY; DESIGN; ELECTRON DETECTION; ELECTRONS; EMISSION; FOILS; GAMMA SPECTROSCOPY; GE SEMICONDUCTOR DETECTORS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; SENSITIVITY; SIGNALS; UNDERGROUND