An efficient 14-MeV neutron detector for use in mixed 2. 5- and 14-MeV neutron beams
- AEA Technology, Harwell Laboratory, Oxfordshire, OX11 0RA (United Kingdom)
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[times]10[sup [minus]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.
- OSTI ID:
- 5405552
- Journal Information:
- Review of Scientific Instruments; (United States), Vol. 64:6; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
JET TOKAMAK
NEUTRON DETECTORS
PLASMA DIAGNOSTICS
DESIGN
CALIBRATION
D-D REACTORS
FOILS
SCATTERING
TIME DEPENDENCE
CLOSED PLASMA DEVICES
MEASURING INSTRUMENTS
RADIATION DETECTORS
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)