Ontology type: schema:ScholarlyArticle
2014-10-16
AUTHORSG. M. Batanov, V. D. Borzosekov, L. V. Kolik, E. M. Konchekov, D. V. Malakhov, A. E. Petrov, K. A. Sarksyan, A. S. Sakharov, N. N. Skvortsova, V. D. Stepakhin, M. A. Tereshchenko, N. K. Kharchev
ABSTRACTReflection of the heating extraordinary microwave incident obliquely onto the surface of the electron cyclotron resonance (ECR) at the second harmonic of the electron gyrofrequency in the 3D magnetic configuration of the L-2M stellarator was studied experimentally. The plasma was heated using two gyrotrons with a total power of 600–700 kW, the specific heating power being 2.4–2.8 MW/m3. The displacement of the ECR region in the course of heating was monitored by measuring the phase of the reflected extraordinary wave. It is found that the growth of the plasma density is accompanied by the displacement of the ECR heating region from the center of the plasma column toward its periphery. The coefficient of reflection of the heating microwave beam from the ECR region was measured. The spectra of short-wavelength (ks ≈ 30 cm−1) plasma density fluctuations were explored by analyzing backscattered microwave radiation. A tenfold increase in the energy of short-wavelength density fluctuations and the growth of the spectral density of fluctuations in the frequency range of 0.3–1.5 MHz were observed. More... »
PAGES769-780
http://scigraph.springernature.com/pub.10.1134/s1063780x14100018
DOIhttp://dx.doi.org/10.1134/s1063780x14100018
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