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Title: Fast neutron-gamma discrimination on neutron emission profile measurement on JT-60U

Abstract

A digital signal processing (DSP) system is applied to stilbene scintillation detectors of the multichannel neutron emission profile monitor in JT-60U. Automatic analysis of the neutron-{gamma} pulse shape discrimination is a key issue to diminish the processing time in the DSP system, and it has been applied using the two-dimensional (2D) map. Linear discriminant function is used to determine the dividing line between neutron events and {gamma}-ray events on a 2D map. In order to verify the validity of the dividing line determination, the pulse shape discrimination quality is evaluated. As a result, the {gamma}-ray contamination in most of the beam heating phase was negligible compared with the statistical error with 10 ms time resolution.

Authors:
; ; ;  [1]; ;  [2];  [3];  [4]
  1. Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579 (Japan)
  2. Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0193 (Japan)
  3. Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578 (Japan)
  4. National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292 (Japan)
Publication Date:
OSTI Identifier:
22058657
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 81; Journal Issue: 10; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; DIGITAL SYSTEMS; DISCRIMINATORS; FAST NEUTRONS; GAMMA DETECTION; GAMMA RADIATION; JT-60U TOKAMAK; NEUTRON EMISSION; PULSE SHAPERS; SIGNALS; SOLID SCINTILLATION DETECTORS; STILBENE; TIME RESOLUTION

Citation Formats

Ishii, K., Okamoto, A., Kitajima, S., Sasao, M., Shinohara, K., Ishikawa, M., Baba, M., and Isobe, M.. Fast neutron-gamma discrimination on neutron emission profile measurement on JT-60U. United States: N. p., 2010. Web. doi:10.1063/1.3496986.
Ishii, K., Okamoto, A., Kitajima, S., Sasao, M., Shinohara, K., Ishikawa, M., Baba, M., & Isobe, M.. Fast neutron-gamma discrimination on neutron emission profile measurement on JT-60U. United States. doi:10.1063/1.3496986.
Ishii, K., Okamoto, A., Kitajima, S., Sasao, M., Shinohara, K., Ishikawa, M., Baba, M., and Isobe, M.. Fri . "Fast neutron-gamma discrimination on neutron emission profile measurement on JT-60U". United States. doi:10.1063/1.3496986.
@article{osti_22058657,
title = {Fast neutron-gamma discrimination on neutron emission profile measurement on JT-60U},
author = {Ishii, K. and Okamoto, A. and Kitajima, S. and Sasao, M. and Shinohara, K. and Ishikawa, M. and Baba, M. and Isobe, M.},
abstractNote = {A digital signal processing (DSP) system is applied to stilbene scintillation detectors of the multichannel neutron emission profile monitor in JT-60U. Automatic analysis of the neutron-{gamma} pulse shape discrimination is a key issue to diminish the processing time in the DSP system, and it has been applied using the two-dimensional (2D) map. Linear discriminant function is used to determine the dividing line between neutron events and {gamma}-ray events on a 2D map. In order to verify the validity of the dividing line determination, the pulse shape discrimination quality is evaluated. As a result, the {gamma}-ray contamination in most of the beam heating phase was negligible compared with the statistical error with 10 ms time resolution.},
doi = {10.1063/1.3496986},
journal = {Review of Scientific Instruments},
number = 10,
volume = 81,
place = {United States},
year = {Fri Oct 15 00:00:00 EDT 2010},
month = {Fri Oct 15 00:00:00 EDT 2010}
}