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Title: Design of the radiation shielding for the time of flight enhanced diagnostics neutron spectrometer at Experimental Advanced Superconducting Tokamak

A radiation shielding has been designed to reduce scattered neutrons and background gamma-rays for the new double-ring Time Of Flight Enhanced Diagnostics (TOFED). The shielding was designed based on simulation with the Monte Carlo code MCNP5. Dedicated model of the EAST tokamak has been developed together with the emission neutron source profile and spectrum; the latter were simulated with the Nubeam and GENESIS codes. Significant reduction of background radiation at the detector can be achieved and this satisfies the requirement of TOFED. The intensities of the scattered and direct neutrons in the line of sight of the TOFED neutron spectrometer at EAST are studied for future data interpretation.
Authors:
; ; ; ; ; ; ; ; ; ; ; ;  [1] ; ;  [2] ;  [3] ;  [4] ; ; ; more »;  [5] « less
  1. School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing (China)
  2. Dipartimento di Fisica, Università di Milano-Bicocca, Milano (Italy)
  3. (Italy)
  4. Istituto di Fisicadel Plasma “P. Caldirola,” Milano (Italy)
  5. Institute of Plasma Physics, CAS, Hefei (China)
Publication Date:
OSTI Identifier:
22308938
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; BACKGROUND RADIATION; COMPUTER CODES; GAMMA RADIATION; HT-7U TOKAMAK; MONTE CARLO METHOD; NEUTRON SOURCES; NEUTRON SPECTROMETERS; SHIELDING; TIME-OF-FLIGHT METHOD