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Title: Study on in situ calibration for neutron flux monitor in the Large Helical Device based on Monte Carlo calculations

Neutron monitoring is important to manage safety of fusion experiment facilities because neutrons are generated in fusion reactions. Monte Carlo simulations play an important role in evaluating the influence of neutron scattering from various structures and correcting differences between deuterium plasma experiments and in situ calibration experiments. We evaluated these influences based on differences between the both experiments at Large Helical Device using Monte Carlo simulation code MCNP5. A difference between the both experiments in absolute detection efficiency of the fission chamber between O-ports is estimated to be the biggest of all monitors. We additionally evaluated correction coefficients for some neutron monitors.
Authors:
; ; ;  [1] ; ;  [2]
  1. Graduate School of Engineering, Nagoya University, Nagoya 464-8603 (Japan)
  2. National Institute for Fusion Science, Toki-city, GIFU 509-5292 (Japan)
Publication Date:
OSTI Identifier:
22308637
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; CALIBRATION; COMPUTERIZED SIMULATION; DEUTERIUM; EFFICIENCY; FISSION CHAMBERS; LHD DEVICE; MONTE CARLO METHOD; NEUTRON DIFFRACTION; NEUTRON FLUX; NEUTRON MONITORS; PLASMA; SAFETY; THERMONUCLEAR REACTIONS