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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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 languageEnglish
Article number10D334
JournalReview of Scientific Instruments
Issue number10
Publication statusPublished - 2010 Oct

ASJC Scopus subject areas

  • Instrumentation


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