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
收藏
页码：682 / 699
页数：18
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