Measurements of the fast electron bremsstrahlung emission during electron cyclotron resonance heating in the HL-2A tokamak

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3488966· OSTI ID:22055736

Zhang, Y P; Liu, Yi; Song, X Y; Yuan, G L; Chen, W; Ji, X Q; Ding, X T; Yang, J W; Zhou, J; Li, X; Yang, Q W; Duan, X R; Pan, C H; Liu, Y ^[1]

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1. Southwestern Institute of Physics, P. O. Box 432, Chengdu 610041 (China)

A fast electron bremsstrahlung (FEB) diagnostic technique based on cadmium telluride (CdTe) detector has been developed recently in the HL-2A tokamak for measurements of the temporal evolution of FEB emission in the energy range of 10-200 keV. With a perpendicular viewing into the plasma on the equatorial plane, the hard x-ray spectra with eight different energy channels are measured. The discrimination of the spectra is implemented by an accurate spectrometry. The system also makes use of fast digitization and software signal processing technology. An ambient environment of neutrons, gammas, and magnetic disturbance requires careful shielding. During electron cyclotron resonance heating, the generation of fast electrons and the oscillations of electron fishbone (e-fishbone) have been found. Using the FEB measurement system, it has been experimentally identified that the mode strongly correlates with the electron cyclotron resonance heating produced fast electrons with 30-70 keV.

• OSTI ID: 22055736
• Journal Information: Review of Scientific Instruments, Vol. 81, Issue 10; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BREMSSTRAHLUNG
CDTE SEMICONDUCTOR DETECTORS
COMPUTER CODES
DIAGNOSTIC TECHNIQUES
DISTURBANCES
ECR HEATING
ELECTRONS
GAMMA RADIATION
HARD X RADIATION
HL-2A TOKAMAK
KEV RANGE 10-100
MAGNETIC FIELDS
NEUTRONS
OSCILLATIONS
PLASMA
SHIELDING
SIGNALS
SPECTROSCOPY
X-RAY SPECTRA