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

K. Ishii; K. Shinohara; M. Ishikawa; M. Baba; M. Isobe; A. Okamoto; S. Kitajima; M. Sasao

doi:10.1063/1.3496986

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

K. Ishii, K. Shinohara, M. Ishikawa, M. Baba, M. Isobe, A. Okamoto, S. Kitajima, M. Sasao

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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- γ 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 γ -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 γ -ray contamination in most of the beam heating phase was negligible compared with the statistical error with 10 ms time resolution.

Original language	English
Article number	10D334
Journal	Review of Scientific Instruments
Volume	81
Issue number	10
DOIs	https://doi.org/10.1063/1.3496986
Publication status	Published - 2010 Oct

ASJC Scopus subject areas

Instrumentation

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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- γ 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 γ -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 γ -ray contamination in most of the beam heating phase was negligible compared with the statistical error with 10 ms time resolution.",

author = "K. Ishii and K. Shinohara and M. Ishikawa and M. Baba and M. Isobe and A. Okamoto and S. Kitajima and M. Sasao",

note = "Funding Information: The authors would like to express their appreciation to the JT-60U team for their contribution to the operation of JT-60U. This work was performed partially with the support of a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology of Japan, “Priority area of Advanced Burning Plasma Diagnostics.”",

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doi = "10.1063/1.3496986",

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AU - Ishii, K.

AU - Shinohara, K.

AU - Ishikawa, M.

AU - Baba, M.

AU - Isobe, M.

AU - Okamoto, A.

AU - Kitajima, S.

AU - Sasao, M.

N1 - Funding Information: The authors would like to express their appreciation to the JT-60U team for their contribution to the operation of JT-60U. This work was performed partially with the support of a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology of Japan, “Priority area of Advanced Burning Plasma Diagnostics.”

PY - 2010/10

Y1 - 2010/10

N2 - 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- γ 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 γ -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 γ -ray contamination in most of the beam heating phase was negligible compared with the statistical error with 10 ms time resolution.

AB - 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- γ 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 γ -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 γ -ray contamination in most of the beam heating phase was negligible compared with the statistical error with 10 ms time resolution.

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

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