A double-helix neutron detector using micron-size 10B powder

Zhehui Wang, C. L. Morris, J. D. Bacon, M. I. Brockwell, J. C. Ramsey

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A double-helix electrode configuration is combined with a 10B powder coating technique to build large-area (9 in.×36 in., or about 23 cm by 91 cm) neutron detectors. The neutron detection efficiency for each of the four prototypes is comparable to 3.7×103 cm3 of 3He inside a cylindrical tube 91 cm long. One unit has been operational continuously for 18 months and the change of efficiency is less than 1%. An analytic model for pulse height spectra is described and the predicted mean film thicknesses agree with the experiment to within 30%. Further detector optimization is possible through film texture, powder size, moderator box and gas. The estimated production cost per unit is less than 3k US$ and the technology is thus suitable for deployment in large numbers.

Original languageEnglish
Pages (from-to)261-267
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume764
DOIs
StatePublished - Nov 11 2014
Externally publishedYes

Keywords

  • Detector lifetime
  • Double-helix electrode configuration
  • Neutron detection efficiency

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