Ontology type: schema:ScholarlyArticle
2003-12
AUTHORSG. M. Batanov, L. V. Kolik, M. I. Petelin, A. E. Petrov, A. A. Pshenichnikov, K. A. Sarksyan, N. N. Skvortsova, N. K. Kharchev
ABSTRACTIt is shown that the relative intensity of the second harmonic of gyrotron radiation on the axis of a microwave beam after quasi-optical filtering in a four-mirror quasi-optical transmission line is about −50 dB of the total radiation intensity. The second-harmonic radiation is used in collective-scattering diagnostics of turbulent density fluctuations in the plasma column of the L-2M stellarator. At an electron temperature of 0.8–1.0 keV and average plasma density of 2.0–2.5×1013 cm−3 (a plasma energy of about 0.6 kJ), which was achieved after the boronization of the vacuum chamber, spatiotemporal structures in plasma density fluctuations were observed in the central region of the plasma column. The correlation time between the structures was found to be on the order of 1 ms. It is shown that the spectrum of the signal from the second-harmonic scattering extends to higher frequencies compared to that from the fundamental-harmonic scattering. More... »
PAGES1019-1027
http://scigraph.springernature.com/pub.10.1134/1.1633621
DOIhttp://dx.doi.org/10.1134/1.1633621
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