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Title: A study on fast digital discrimination of neutron and gamma-ray for improvement neutron emission profile measurement

Neutron and γ-ray (n-γ) discrimination with a digital signal processing system has been used to measure the neutron emission profile in magnetic confinement fusion devices. However, a sampling rate must be set low to extend the measurement time because the memory storage is limited. Time jitter decreases a discrimination quality due to a low sampling rate. As described in this paper, a new charge comparison method was developed. Furthermore, automatic n-γ discrimination method was examined using a probabilistic approach. Analysis results were investigated using the figure of merit. Results show that the discrimination quality was improved. Automatic discrimination was applied using the EM algorithm and k-means algorithm.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [2] ;  [4] ; ; ;  [5]
  1. National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630 (Japan)
  2. National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292 (Japan)
  3. (SOKENDAI), 322-6 Oroshi-cho, Toki 509-5292 (Japan)
  4. Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0913 (Japan)
  5. Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan)
Publication Date:
OSTI Identifier:
22308638
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALGORITHMS; GAMMA RADIATION; MAGNETIC CONFINEMENT; MEASURING METHODS; MEMORY DEVICES; NEUTRON EMISSION; NEUTRONS; PARTICLE DISCRIMINATION; PERFORMANCE; PROBABILISTIC ESTIMATION; PROCESSING; SAMPLING; SIGNALS; THERMONUCLEAR DEVICES