AN EFFICIENT 14-MEV NEUTRON DETECTOR FOR USE IN MIXED 2.5-MEV AND 14-MEV NEUTRON BEAMS

被引:2
作者
CROFT, S
BOND, DS
HAWKES, NP
机构
[1] AEA Technology, Harwell Laboratory, Oxfordshire
关键词
D O I
10.1063/1.1144055
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
A neutron detector capable of measuring the time-dependent yield of 14-MeV neutrons from a D-D plasma producing predominantly 2.5-MeV neutrons has been developed. The detector consists of a thick polythene recoil proton radiator backed by a graphite foil attached to a large area totally depleted ion-implanted diode. Protons scattered in the forward direction by 14-MeV neutrons pass through the graphite foil and are registered in the diode. Recoil protons from 2.5-MeV neutrons, however, are prevented from reaching the diode by the foil. When operated with a 1.5-MeV energy bias, the measured neutron detection efficiency for 15-MeV neutrons is 3.2 X 10(-3) per neutron. The corresponding figure for 3. 1-MeV neutrons is a factor of 540 lower. The neutron detector and its laboratory calibration are described, as is its deployment at the Joint European Torus where it serves as a triton burn-up monitor.
引用
收藏
页码:1418 / 1424
页数:7
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