The 2.5 MeV neutron flux monitor for MAST

被引：20

作者：

Cecconello, M. ^{[1
]}

Sangaroon, S. ^{[1
]}

Conroy, S. ^{[1
]}

Donato, M. ^{[1
]}

Ericsson, G. ^{[1
]}

Marini-Bettolo, C. ^{[1
]}

Ronchi, R. ^{[1
]}

Strom, P. ^{[1
]}

Weiszflog, M. ^{[1
]}

Wodniak, I. ^{[1
]}

Turnyanskiy, M. ^{[2
]}

Akers, R. ^{[2
]}

Cullen, A. ^{[2
]}

Fitzgerald, I. ^{[2
]}

McArdle, G. ^{[2
]}

Pacoto, C. ^{[2
]}

Thomas-Davies, N. ^{[2
]}

机构：

[1] Uppsala Univ, EURATOM VR Assoc, Dept Phys & Astron, Uppsala, Sweden

[2] EURATOM CCFE Fus Assoc, Culham Sci Ctr, Abingdon, Oxon, England

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2014年 / 753卷

基金：

英国工程与自然科学研究理事会; 瑞典研究理事会;

关键词：

Neutron flux monitor; Liquid scintillator; Fusion diagnostics; PULSE-SHAPE-DISCRIMINATION; ORGANIC SCINTILLATORS; LIQUID SCINTILLATORS; ENERGY RESOLUTION; GAMMA-CALIBRATION; HIGH-PERFORMANCE; STABILITY; TESTS; POWER;

D O I：

10.1016/j.nima.2014.03.060

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A proof-of-principle collimated Neutron flux Camera (NC) monitor for the measurement of the 2.45 MeV neutron emission from the deuterium-deuterium fusion reactions has been developed, installed and put into use at the Mega Ampere Spherical Tokamak (MAST). The NC measures the spatial and time resolved volume integrated neutron emissivity in deuterium fusion plasmas in the presence of auxiliary plasma heating along two equatorial and two diagonal lines of sight whose tangency radius can be varied between plasma discharges. This paper describes the NC design principles, their technical realization and its performances illustrated with experimental observations of different plasma scenarios. Neutron. count rates in the range 0.1-1.5 MHz are routinely observed allowing time resolutions as high as 1 ms with a statistical uncertainty less than 10% and an energy threshold of 0.5 MeV. Examples of the effect of plasma instabilities on the neutron emission are presented. The good results obtained will be used for the design of the neutron flux camera monitor for MAST Upgrade. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：72 / 83

页数：12

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