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Title: Measurement of the runaway electrons in the HT-7 tokamak

Abstract

A thermographic camera and four hard x-ray detectors have been developed to measure the runaway electrons in the HT-7 tokamak. The synchrotron radiation originated from the runaway electrons was measured by an infrared (IR) camera working in the wavelength ranges of 7.5-13 {mu}m. With a tangential viewing into the plasma in the direction of the electron approach on the equatorial plane, the synchrotron radiation from the runaway electrons was measured in a full poloidal cross section. Three NaI scintillators are used to monitor the hard x-ray radiation (HXR) in the energy ranges of 0.5-7 MeV, and a CdTe detector is used to monitor the low-energy HXR in the energy ranges of 0.3-1.2 MeV. The combination of infrared camera and hard x-ray detectors provides a powerful tool to investigate the runaway electron dynamics in HT-7. Runaways in the core and edge regions are monitored simultaneously. The parameters of runaway beam in the core are deduced from the IR pictures. The interaction of runway electrons with toroidal magnetic field ripple is monitored from the HXR emission.

Authors:
; ; ; ; ; ; ;  [1]
  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
Publication Date:
OSTI Identifier:
20778556
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 77; Journal Issue: 1; Other Information: DOI: 10.1063/1.2140488; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOUNDARY LAYERS; CAMERAS; CDTE SEMICONDUCTOR DETECTORS; HARD X RADIATION; HT-7 TOKAMAK; MAGNETIC FIELD RIPPLES; MONITORS; PLASMA; PLASMA CONFINEMENT; PLASMA DIAGNOSTICS; RUNAWAY ELECTRONS; SODIUM IODIDES; SYNCHROTRON RADIATION

Citation Formats

Chen, Z.Y., Wan, B.N., Lin, S.Y., Shi, Y.J., Hu, L.Q., Gong, X.Z., Lin, H., and Asif, M. Measurement of the runaway electrons in the HT-7 tokamak. United States: N. p., 2006. Web. doi:10.1063/1.2140488.
Chen, Z.Y., Wan, B.N., Lin, S.Y., Shi, Y.J., Hu, L.Q., Gong, X.Z., Lin, H., & Asif, M. Measurement of the runaway electrons in the HT-7 tokamak. United States. doi:10.1063/1.2140488.
Chen, Z.Y., Wan, B.N., Lin, S.Y., Shi, Y.J., Hu, L.Q., Gong, X.Z., Lin, H., and Asif, M. Sun . "Measurement of the runaway electrons in the HT-7 tokamak". United States. doi:10.1063/1.2140488.
@article{osti_20778556,
title = {Measurement of the runaway electrons in the HT-7 tokamak},
author = {Chen, Z.Y. and Wan, B.N. and Lin, S.Y. and Shi, Y.J. and Hu, L.Q. and Gong, X.Z. and Lin, H. and Asif, M.},
abstractNote = {A thermographic camera and four hard x-ray detectors have been developed to measure the runaway electrons in the HT-7 tokamak. The synchrotron radiation originated from the runaway electrons was measured by an infrared (IR) camera working in the wavelength ranges of 7.5-13 {mu}m. With a tangential viewing into the plasma in the direction of the electron approach on the equatorial plane, the synchrotron radiation from the runaway electrons was measured in a full poloidal cross section. Three NaI scintillators are used to monitor the hard x-ray radiation (HXR) in the energy ranges of 0.5-7 MeV, and a CdTe detector is used to monitor the low-energy HXR in the energy ranges of 0.3-1.2 MeV. The combination of infrared camera and hard x-ray detectors provides a powerful tool to investigate the runaway electron dynamics in HT-7. Runaways in the core and edge regions are monitored simultaneously. The parameters of runaway beam in the core are deduced from the IR pictures. The interaction of runway electrons with toroidal magnetic field ripple is monitored from the HXR emission.},
doi = {10.1063/1.2140488},
journal = {Review of Scientific Instruments},
number = 1,
volume = 77,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}