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VACUUM ULTRAVIOLET SPECTRA OF CT-6B TOKAMAK PLASMA

HUANG MAO WANG WEN-SHU LI ZAN-LIANG

VACUUM ULTRAVIOLET SPECTRA OF CT-6B TOKAMAK PLASMA

HUANG MAO, WANG WEN-SHU, LI ZAN-LIANG
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  • Received Date:  16 July 1986
  • Published Online:  18 March 2005

VACUUM ULTRAVIOLET SPECTRA OF CT-6B TOKAMAK PLASMA

  • 1. (1)北京大学分校物理系; (2)中国科学院物理研究所

Abstract: A spectrographic survey of the impurity lines was made on the CT-6B Tokamak with I metre grazing incidence spectrograph. The observed wavelength ranges were from 1580 to 550 ? and from 460 to 43 ?, using 300 lines/mm and 1200 lines/mm gratings respecrively. The survey revealed that the main impurities in CT-6B Tokamak plasma are Mo for high Z impurities and C, N, O for low Z impurities. There are a large number of OV and OVI lines with intense emission. We also observed MoVIIl resonance lines 234.314 ?, 235.510 ? and 237.215 ?. The shortest observed wavelengths are the second order of OVII lines 21.6020 ? and 21804 ?. The first order of these two lines situate beyond the film and can not be recorded. According tc the features of the spectra and the ionization potentials of OV, OVI as well as MoVII, the average electron temperature for CT-6B Tokamak is estimated to be about 140 eV. Oxygen is the main impurity in CT-6B Tokamak, and its lines emission is the main portion of energy loss in CT-6B Tokamak. Lines of the main components of the vacuum-vessel material such as Fe, Cr, Ni and Ti have not been found.

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