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B-10 multi-grid proportional gas counters for large area thermal neutron detectors

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Author

  • Ken Andersen
  • T. Bigault
  • J. Birch
  • J. C. Buffet
  • J. Correa
  • Richard Hall-Wilton
  • L. Hultman
  • Carina Höglund
  • B. Guerard
  • J. Jensen
  • A. Khaplanov
  • O. Kirstein
  • F. Piscitelli
  • P. Van Esch
  • Christian Vettier
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Summary, in English

He-3 was a popular material in neutrons detectors until its availability dropped drastically in 2008. The development of techniques based on alternative convertors is now of high priority for neutron research institutes. Thin films of B-10 or (B4C)-B-10 have been used in gas proportional counters to detect neutrons, but until now, only for small or medium sensitive area. We present here the multi-grid design, introduced at the ILL and developed in collaboration with ESS for LAN (large area neutron) detectors. Typically thirty (B4C)-B-10 films of 1 mu m thickness are used to convert neutrons into ionizing particles which are subsequently detected in a proportional gas counter. The principle and the fabrication of the multi-grid are described and some preliminary results obtained with a prototype of 200 cm x 8 cm are reported; a detection efficiency of 48% has been measured at 2.5 angstrom with a monochromatic neutron beam line, showing the good potential of this new technique. (C) 2013 Elsevier B.V. All rights reserved.

Publishing year

2013

Language

English

Pages

116-121

Publication/Series

Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

Volume

720

Document type

Journal article

Publisher

Elsevier

Topic

  • Accelerator Physics and Instrumentation

Keywords

  • Neutron detector
  • Boron convertor
  • Multi-grid

Status

Published

ISBN/ISSN/Other

  • ISSN: 0167-5087