Abstract
For studying entries of impurities into thermonuclear plasma, when injecting heated neutral beams, the spectroscopic diagnostics intended for promptly monitoring the plasma composition of the radiofrequency (RF) emitter of the powerful fast neutral beam injector is designed. The analysis of plasma radiation spectra allowed us to determine the rotational temperature of the neutral hydrogen and estimate the oxygen-to-carbon impurity ratio in the RF emitter. In this work, the long-term dynamics of the neutral oxygen line brightness is studied, and the influence of the discharge chamber ageing and warming-up on the impurity content is determined.
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Original Russian Text © S.V. Polosatkin, E.S. Grishnyaev, V.I. Davydenko, I.A. Ivanov, A.A. Podyminogin, I.V. Shikhovtsev, 2010, published in Pribory i Tekhnika Eksperimenta, 2010, No. 2, pp. 104–109.
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Polosatkin, S.V., Grishnyaev, E.S., Davydenko, V.I. et al. Optical spectroscopy of plasma of the radio-frequency emitter of a powerful fast neutral beam injector. Instrum Exp Tech 53, 253–257 (2010). https://doi.org/10.1134/S002044121002017X
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DOI: https://doi.org/10.1134/S002044121002017X