A study on fast digital discrimination of neutron and gamma-ray for improvement neutron emission profile measurement

被引：10

作者：

Uchida, Y. ^{[1
]}

Takada, E. ^{[1
]}

Fujisaki, A. ^{[1
]}

Isobe, M. ^{[2
,3
]}

Ogawa, K. ^{[2
]}

Shinohara, K. ^{[4
]}

Tomita, H. ^{[5
]}

Kawarabayashi, J. ^{[5
]}

Iguchi, T. ^{[5
]}

机构：

[1] Toyama Coll, Natl Inst Technol, Toyama 9398630, Japan

[2] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[3] Grad Univ Adv Studies SOKENDAI, Toki, Gifu 5095292, Japan

[4] Japan Atom Energy Agcy, Naka, Ibaraki 3110913, Japan

[5] Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 11期

关键词：

SCINTILLATOR; MONITOR;

D O I：

10.1063/1.4891711

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Neutron and gamma-ray (n-gamma) discrimination with a digital signal processing system has been used to measure the neutron emission profile in magnetic confinement fusion devices. However, a sampling rate must be set low to extend the measurement time because the memory storage is limited. Time jitter decreases a discrimination quality due to a low sampling rate. As described in this paper, a new charge comparison method was developed. Furthermore, automatic n-gamma discrimination method was examined using a probabilistic approach. Analysis results were investigated using the figure of merit. Results show that the discrimination quality was improved. Automatic discrimination was applied using the EM algorithm and k-means algorithm. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

引用

页数：4

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