Time-resolved 14-MeV neutron detector for triton confinement studies

Journal Article · Fri Aug 01 00:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139180· OSTI ID:5642458

Smith, J R; Fisher, R K; Leffler, J S; Newman, D E

Previous measurements of triton burnup in deuterium tokamak plasmas show an anomalously small burnup for low-q-italic discharges with significant magnetohydrodynamic activity. This may have important implications for alpha particle burnup in a fusion reactor. By developing a detector capable of time-resolved 14-MeV neutron measurements, it should be possible to separate triton confinement and slowdown anomalies. We are testing lithium-free glass scintillators which would observe 14-MeV neutrons through prompt /sup 28/Si(n-italic, p-italic) /sup 28/Al reactions. These detectors are not sensitive to the much larger 2.5-MeV neutron background and should also have less sensitivity to the large thermal neutron background when compared to conventional /sup 6/Li-depleted glasses. Measurements of detector sensitivity to signal and potential background sources are being performed using a 14-MeV neutron source and radioactive sources. The expected signal behavior under various DIII-D plasma and beam conditions will also be presented.

• Research Organization: GA Technologies Inc., P.O. Box 85608, San Diego, California 92138
• OSTI ID: 5642458
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 57:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NEUTRON DETECTORS
SENSITIVITY
PLASMA DIAGNOSTICS
TOKAMAK DEVICES
TRITONS
PLASMA CONFINEMENT
CONFINEMENT
MEV RANGE 01-10
MEV RANGE 10-100
SCINTILLATION COUNTERS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
ENERGY RANGE
MEASURING INSTRUMENTS
MEV RANGE
RADIATION DETECTORS
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics