The thin-foil magnetic proton recoil neutron spectrometer MPRu at JET

被引：45

作者：

Sunden, E. Andersson ^{[1
]}

Sjoestrand, H. ^{[1
]}

Conroy, S. ^{[1
]}

Ericsson, G. ^{[1
]}

Johnson, M. Gatu ^{[1
]}

Giacomelli, L. ^{[1
]}

Hellesen, C. ^{[1
]}

Hjalmarsson, A. ^{[1
]}

Ronchi, E. ^{[1
]}

Weiszflog, M. ^{[1
]}

Kaellne, J. ^{[2
]}

Gorini, G. ^{[3
,4
]}

Tardocchi, M. ^{[3
,4
]}

Combo, A. ^{[5
]}

Cruz, N. ^{[5
]}

Batista, A. ^{[5
]}

Pereira, R. ^{[5
]}

Fortuna, R. ^{[5
]}

Sousa, J. ^{[5
]}

Popovichev, S. ^{[6
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, EURATOM VR, S-75120 Uppsala, Sweden

[2] Uppsala Univ, Dept Engn Sci, EURATOM VR, S-75121 Uppsala, Sweden

[3] Milano Bicocca Univ, Dept Phys, Milan, Italy

[4] EURATOM ENEA CNR, CNR, Ist Fis Plasma, Milan, Italy

[5] EURATOM IST, Inst Super Tecn, Ctr Fusao Nucl, P-1049001 Lisbon, Portugal

[6] Culham Sci Ctr, JET EFDA, Abingdon OX14 3DB, Oxon, England

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 610卷 / 03期

基金：

瑞典研究理事会;

关键词：

Neutron; Spectrometer; 14 MeV neutrons; 2.5 MeV neutrons; MPR; MPRu; Fusion; Diagnostic; HIGH-PERFORMANCE; EMISSION; CALIBRATION; SYSTEM;

D O I：

10.1016/j.nima.2009.09.025

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Neutrons are produced in fusion energy experiments with both deuterium (D) and deuterium-tritium (DT) plasmas. Neutron spectroscopy is a valuable tool in the study of the underlying fuel ion populations. The magnetic proton recoil neutron spectrometer, originally installed at JET in 1996 for 14-MeV neutron measurements, has been upgraded, with the main aim of improving its signal-to-background ratio (S/B), making measurements of the 2.5-MeV neutron emission in D plasmas possible. The upgrade includes a new focal-plane detector, based on the phoswich technique and consequently less sensitive to background, and a new custom-designed digital data acquisition system based on transient recorder cards. Results from JET show that the upgraded MPRu can measure 2.5-MeV neutrons with S/B=5, an improvement by a factor of 50 compared with the original MPR.S/B of 2.8 x 10(4) in future DT experiments is estimated. The performance of the MPRu is exemplified with results from recent D plasma operations at JET, concerning both measurements with Ohmic, ion cyclotron resonance (ICRH) and neutral beam injection (NBI) plasma heating, as well as measurements of tritium burn-up neutrons. The upgraded instrument allows for 2.5-MeV neutron emission and deuterium ion temperature measurements in plasmas with low levels of tritium, a feature necessary for the ITER experiment. (C) 2009 Euratom. Published by Elsevier B.V. All rights reserved.

引用

页码：682 / 699

页数：18

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