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Experimental studies on pulsed neutron sensitivity of a fusion neutron spectrometer

Qi Jian-Min Zhou Lin Jiang Shi-Lun Zhang Jian-Hua

Experimental studies on pulsed neutron sensitivity of a fusion neutron spectrometer

Qi Jian-Min, Zhou Lin, Jiang Shi-Lun, Zhang Jian-Hua
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Publishing process
  • Received Date:  13 January 2013
  • Accepted Date:  10 September 2013
  • Published Online:  05 December 2013

Experimental studies on pulsed neutron sensitivity of a fusion neutron spectrometer

  • 1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
Fund Project:  Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 11005095) and the Science and Technology Development Foundation of China Academy of Engineering Physics (Grant No. 2011B0103017).

Abstract: A sensitivity optimized magnetic proton recoil (MPROS) spectrometer for measuring both steady and pulsed fusion neutron spectra in several complicated environments is developed. The proton energy-position projection relationship of the spectrometer is measured by utilizing an imaging plate. The energy response to neutron sensitivity of the MPROS spectrometer is studied through a single event count method on an accelerated steady DT neutron source and simulations by a three-dimensional charged particle transport code. The detection efficiency of the spectrometer to DT neutrons reaches a level of 2×10-5 cm2 through high efficiency parameter settings, therefore the experimental data of high statistic accuracy are obtained on a comparatively weak neutron source. Results from simulations and experiments, such as α particle calibrations, and DT neutron calibrations, achieve good consistency. Based on this conclusion, precise solution technique of measured spectra can be developed to increase the sensitivity and energy resolution of measurements of pulsed neutron spectroscopy.

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