Multi-Channel Neutron Emission and Triton Burn-up Measurement on JT-60U Using Digital Signal Processors

Keiichi ISHII; Kouji SHINOHARA; Masao ISHIKAWA; Toshio OKUJI; Mamoru BABA; Mitsutaka ISOBE; Sumio KITAJIMA; Mamiko SASAO

doi:10.1585/pfr.5.S1043

Regular Articles

Multi-Channel Neutron Emission and Triton Burn-up Measurement on JT-60U Using Digital Signal Processors

Keiichi ISHII, Kouji SHINOHARA, Masao ISHIKAWA, Toshio OKUJI, Mamoru BABA, Mitsutaka ISOBE, Sumio KITAJIMA, Mamiko SASAO

Author information

Keiichi ISHII
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
Kouji SHINOHARA
Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0193, Japan
Masao ISHIKAWA
Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0193, Japan
Toshio OKUJI
Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578, Japan
Mamoru BABA
Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578, Japan
Mitsutaka ISOBE
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
Sumio KITAJIMA
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
Mamiko SASAO
Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan

Keywords: JT-60U, neutron diagnostics, Digital signal Processors, triton burn-up

JOURNAL FREE ACCESS

2010 Volume 5 Pages S1043

DOI https://doi.org/10.1585/pfr.5.S1043

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Abstract

In JT-60U, the multi-channel neutron profile monitor measures the line-integrated neutron emission. A digital signal processing (DSP) system was applied to all neutron detectors in the neutron profile monitor. A new 2D mapping method for DSP data analysis was developed to discriminate neutrons from γ-rays. The combination of DSP and the 2D map enabled the simultaneous measurement of DD and DT neutrons with one detector. The time evolutions of DD and of DT neutrons showed different responses to the ITB formation, depending on the viewing chord.

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