Absolute calibration of neutron detection systems on TFTR and accurate comparison of source strength measurements to transport simulations (invited)

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1141671· OSTI ID:6351695

Barnes, C W; Bell, M G; Hendel, H W; Jassby, D L; Mikkelsen, D; Roquemore, A L; Scott, S D; Strachan, J D; Zarnstorff, M C ^[1]

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1. Princeton Plasma Physcis Laboratory, Princeton, New Jersey 08543 (USA)

Accurate, absolutely calibrated measurements of the neutron source strength are needed for determining the quality of plasma performance, for constraining transport analysis, and for studying fast ion physics such as triton burnup. Obtaining an accurate calibration involves more than performing {ital in} {ital situ} source calibrations. Efforts on TFTR illustrate the additional need for careful detector characterization, periodic renormalization, and proper cross calibration of less sensitive detectors. Multiple detector systems have been developed on TFTR to provide redundancy and a range of energy sensitivity and time resolution. Three independently calibrated systems now agree in their determination of source strength within relative uncertainties of 15%--20%. These accurate neutron measurements can be effectively used to constrain transport simulations of neutral beam injection and test the modeling and simulation assumptions.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6351695
• Journal Information: Review of Scientific Instruments; (USA), Journal Name: Review of Scientific Instruments; (USA) Vol. 61:10; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
APERTURES
CALIBRATION
FOILS
MEASURING INSTRUMENTS
NEUTRON DETECTORS
OPENINGS
PLASMA DIAGNOSTICS
PLASTIC SCINTILLATION DETECTORS
RADIATION DETECTORS
RESOLUTION
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
TFTR TOKAMAK
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS