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Title: Monte Carlo simulation of a Bonner sphere spectrometer for application to the determination of neutron field in the Experimental Advanced Superconducting Tokamak experimental hall

To assess the neutron energy spectra and the neutron dose for different positions around the Experimental Advanced Superconducting Tokamak (EAST) device, a Bonner Sphere Spectrometer (BSS) was developed at Peking University, with totally nine polyethylene spheres and a SP9 {sup 3}He counter. The response functions of the BSS were calculated by the Monte Carlo codes MCNP and GEANT4 with dedicated models, and good agreement was found between these two codes. A feasibility study was carried out with a simulated neutron energy spectrum around EAST, and the simulated “experimental” result of each sphere was obtained by calculating the response with MCNP, which used the simulated neutron energy spectrum as the input spectrum. With the deconvolution of the “experimental” measurement, the neutron energy spectrum was retrieved and compared with the preset one. Good consistence was found which offers confidence for the application of the BSS system for dose and spectrum measurements around a fusion device.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;  [1] ; ; ; ;  [2] ;  [3] ;  [4]
  1. State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
  2. Institute of Plasma Physics, CAS, Hefei 230031 (China)
  3. Dipartimento di Fisica, Università di Milano-Bicocca, Milano 20126 (Italy)
  4. (Italy)
Publication Date:
OSTI Identifier:
22308948
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; BONNER SPHERE SPECTROMETERS; COMPUTERIZED SIMULATION; ENERGY SPECTRA; FEASIBILITY STUDIES; HE-3 COUNTERS; HT-7U TOKAMAK; MONTE CARLO METHOD; NEUTRON DOSIMETRY; NEUTRONS; POLYETHYLENES; RESPONSE FUNCTIONS