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Title: Neutron emission measurement at the HL-2A tokamak device with a liquid scintillation detector

Neutron emission measurement at the HL-2A tokamak device with a liquid scintillation detector is described. The detector was placed at a location with little structure material in the field of view, and equipped with a gain monitoring system which could provide the possibility to evaluate the gain variation as well as to correct for the detector response. Time trace of the neutron emissivity was obtained and it was consistent with the result of a standard {sup 235}U fission chamber. During the plasma discharge the neutron yield could vary by about four orders of magnitude and the fluctuation of the detector gain was up to about 6%. Pulse height spectrum of the liquid scintillation detector was constructed and corrected with the aid of the gain monitoring system, and the correction was found to be essential for the assessment of the neutron energy spectrum. This successful measurement offered experience and confidence for the application of liquid scintillation detectors in the upcoming neutron camera system.
Authors:
; ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [2] ; ; ;  [3]
  1. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, 100871 Beijing (China)
  2. Dipartimento di Fisica ‘G. Occhialini’, Universita degli Studi di Milano Bicocca, Piazza della Scienza 3, 20126 Milano (Italy)
  3. Southwestern Institute of Physics, 610000 Chengdu (China)
Publication Date:
OSTI Identifier:
22305890
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 10; 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; EMISSIVITY; ENERGY SPECTRA; FISSION CHAMBERS; GAIN; HL-2A TOKAMAK; LIQUID SCINTILLATION DETECTORS; MONITORING; NEUTRON CAMERAS; NEUTRON EMISSION; PLASMA; PULSES; URANIUM 235