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Title: Evaluation of two-stage system for neutron measurement aiming at increase in count rate at Japan Atomic Energy Agency-Fusion Neutronics Source

In order to increase the count rate capability of a neutron detection system as a whole, we propose a multi-stage neutron detection system. Experiments to test the effectiveness of this concept were carried out on Fusion Neutronics Source. Comparing four configurations of alignment, it was found that the influence of an anterior stage on a posterior stage was negligible for the pulse height distribution. The two-stage system using 25 mm thickness scintillator was about 1.65 times the count rate capability of a single detector system for d-D neutrons and was about 1.8 times the count rate capability for d-T neutrons. The results suggested that the concept of a multi-stage detection system will work in practice.
Authors:
; ;  [1] ; ;  [2] ;  [3] ;  [4]
  1. Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 (Japan)
  2. Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Miyagi 980-8579 (Japan)
  3. Cyclotron and Radioisotope Center, Tohoku University, Sendai, Miyagi 980-8578 (Japan)
  4. Organization for Research Initiatives and Development, Doshisha University, Kyoto 602-8580 (Japan)
Publication Date:
OSTI Identifier:
22303726
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALIGNMENT; CONFIGURATION; COUNTING RATES; JAEA; NEUTRON DETECTION; NEUTRON SOURCES; PULSES; THERMONUCLEAR REACTIONS