Cross calibration of neutron detectors for deuterium-tritium operation in TFTR

Journal Article · Sat Dec 31 23:00:00 EST 1994 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1146197· OSTI ID:6690167

Johnson, L C; Barnes, C W; Duong, H H; Heidbrink, W W; Jassby, D L; Loughlin, M J; Roquemore, A L; Ruskov, E; Strachan, J D ^[1]

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1. Princeton University, Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

During the initial deuterium-tritium experiments on TFTR, neutron emission was measured with [sup 235]U and [sup 238]U fission chambers, silicon surface barrier diodes, spatially collimated [sup 4]He proportional counters and ZnS scintillators, and a variety of elemental activation foils. The activation foils, [sup 4]He counters, and silicon diodes can discriminate between 14 and 2.5 MeV neutrons. The other detectors respond to both DD and DT neutrons but are more sensitive to the latter. The proportional counters, scintillators, and some of the fission chambers were calibrated absolutely, using a 14 MeV neutron generator positioned at numerous locations inside the TFTR vacuum vessel. Although the directly calibrated systems were saturated during the highest-power deuterium-tritium operation, they allowed cross calibration of less sensitive fission chambers and silicon diodes. The estimated absolute accuracy of the uncertainty-weighted mean of these cross calibrations, combined with an independent calibration derived from activation foil determinations of total neutron yield, is [plus minus]7%.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6690167
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:1; 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
DESIGN
EMISSION
MEASURING INSTRUMENTS
NEUTRON ACTIVATION ANALYZERS
NEUTRON DETECTORS
NEUTRON EMISSION
PERFORMANCE
PLASMA DIAGNOSTICS
PROPORTIONAL COUNTERS
RADIATION DETECTORS
SCINTILLATION COUNTERS
TFTR TOKAMAK
THERMONUCLEAR DEVICES
TOKAMAK DEVICES