Time resolved neutron flux diagnostics for quasi-steady-state operation study of the HT-7 tokamak
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
Time resolved neutron flux diagnostic systems based on BF{sub 3} proportional counter and ZnS(Ag) scintillator have been developed and implemented on the HT-7 superconducting tokamak. A ten-channel flexible data acquisition system designed with a PCI-8554 general digital counter and industry PC is equipped. Calibrations are made with several neutron sources. The consistencies of experimental data from two techniques have been proven; the BF{sub 3} based system is more reliable with better detection efficiency. The measured neutron yield shows good agreement with the simple numerical calculation. The observed photo-neutron production indicates that photon-nuclear reactions are dominant in several special cases such as low density and disruption conditions. Good agreement on ion temperature deduced from neutron diagnosis and neutral particle analyzer under high parameter plasma conditions implies that neutron flux diagnostics can be used as an effective higher temporal resolution ion temperature monitor.
- OSTI ID:
- 20641294
- Journal Information:
- Review of Scientific Instruments, Vol. 75, Issue 10; Conference: 15. topical conference on high temperature plasma diagnostics, San Diego, CA (United States), 19-22 Apr 2004; Other Information: DOI: 10.1063/1.1789616; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BORON FLUORIDES
DATA ACQUISITION
DATA ACQUISITION SYSTEMS
ELECTRON TEMPERATURE
HT-7 TOKAMAK
ION TEMPERATURE
NEUTRAL PARTICLE ANALYZERS
NEUTRON FLUX
NEUTRON SOURCES
NUCLEAR REACTIONS
PHOTONS
PLASMA DIAGNOSTICS
PROPORTIONAL COUNTERS
SEMICONDUCTOR MATERIALS
SILVER
STEADY-STATE CONDITIONS
SUPERCONDUCTING DEVICES
TIME RESOLUTION
ZINC SULFIDES