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This content will become publicly available on October 31, 2018

Title: An innovative bolometric Cherenkov-light detector for a double beta decay search

Here, we present here an innovative cryogenic light detector capable to measure a few tens of eV signal thanks to the amplification assisted by the Neganov-Luke effect. The thermal signal boost in the presence of an electric field allows us to improve the signal-to-noise ratio reaching a baseline noise of around 20 eV. This device - coupled to an enriched 130TeO 2 bolometer (435 g) - registered 160 eV Cherenkov light signal induced by 2615 keV 208 Tl with a signal to noise ratio about 6:1. Since α particles emitted in decays of natural radionuclides do not produce the Cherenkov radiation, we were then able to achieve an efficient α/γ separation in the region of interest for neutrinoless double beta decay of 130 Te (Q-value is 2527 keV). Specifically, a rejection factor of 99.9% for α particles was obtained with a 98.3% acceptance of β/γ events. The achieved α rejection efficiency is required to reduce the dominant α background in the follow-up of the CUORE experiment (CUPID), a ton-scale bolometric search with particle identification.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [6] ;  [7] ;  [8] ;  [1] ;  [1] ;  [9] ;  [10] ;  [11] ;  [12] ;  [1] ;  [10] ;  [9] ;  [10] ;  [8] more »;  [10] ;  [13] ;  [8] ;  [9] ;  [14] ;  [6] « less
  1. Univ. of Paris-Saclay, Orsay (France). Center for Nuclear Sciences and Matter Sciences (CSNSM)
  2. National Inst. of Nuclear Physics (INFN), Assergi (Italy). Gran Sasso National Labs.; Univ. of South Carolina, Columbia, SC (United States). Dept. of Physics and Astronomy
  3. Univ. of South Carolina, Columbia, SC (United States). Dept. of Physics and Astronomy
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. National Inst. of Nuclear Physics (INFN), Rome (Italy)
  6. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics
  7. Univ. of Paris-Saclay, Orsay (France). Center for Nuclear Sciences and Matter Sciences (CSNSM); Univ. of Insubria, Como (Italy). Depart. of Applied Science and Technology (DISAT)
  8. National Inst. of Nuclear Physics (INFN), Milano (Italy)
  9. National Inst. of Nuclear Physics (INFN), Assergi (Italy). Gran Sasso National Labs., Gran Sasso Science Inst.
  10. National Inst. of Nuclear Physics (INFN), Assergi (Italy). Gran Sasso National Labs.
  11. Univ. of Paris-Saclay, Gif-sur-Yvette (France). Inst. of Research into the Fundamental Laws of the Universe (IRFU)
  12. Univ. of California, Berkeley, CA (United States). Dept. of Nuclear Engineering
  13. Univ. of Paris-Saclay, Orsay (France). Center for Nuclear Sciences and Matter Sciences (CSNSM); Inst. for Nuclear Research, Kyiv (Ukraine)
  14. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; NA0000979; AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; neutrino; neganov-luke effect; cherenkov light
OSTI Identifier:
1416913