An efficient 14-MeV neutron detector for use in mixed 2. 5- and 14-MeV neutron beams

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1144055· OSTI ID:5405552

Croft, S; Bond, D S; Hawkes, N P ^[1]

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1. 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), Journal Name: Review of Scientific Instruments; (United States) Vol. 64:6; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
CALIBRATION
CLOSED PLASMA DEVICES
D-D REACTORS
DESIGN
FOILS
JET TOKAMAK
MEASURING INSTRUMENTS
NEUTRON DETECTORS
PLASMA DIAGNOSTICS
RADIATION DETECTORS
SCATTERING
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TIME DEPENDENCE
TOKAMAK DEVICES