XXXIII International Conference on Plasma Physics and CF, February 13 – 17, 2006, Zvenigorod
WAVE BEAMS IN ANISOTROPIC DISSIPATIVE MEDIA
A.A. Balakin, M.A. Balakina, G.V. Permitin, A.I. Smirnov
IAP RAS, Nizhny Novgorod,Russia, e-mail: mina@appl.sci-nnov.ru
For the case of smoothly inhomogeneous anisotropic and gyroptopic media with dissipation the
quasioptical description of wide (on the wave length scale) electromagnetic waves beams derived in
[1] has been generalized. Parabolic equation for the complex field envelope considering mutual
influence of focusing medium features, aberrations and dissipation is derived. The equation is
formulated in curvilinear coordinated system attached to the reference ray [2, 3] in vicinity of which
the wave beam is localized. On the example of electron cyclotron absorption the analysis of wave
beam “behaviour” in dissipation zone has been fulfilled. Some interesting physical effects caused
by dissipation have been demonstrated: the “anomalous broadening” in absorption zone, the
“diffraction leaking” of the field in dissipation region, displacement of the effective “center of
mass” of the beam relatively to the central (reference) geomtrooptical ray. Results of numerical
solution in model medium and for “real” ITER-like parameters are presented.
References.
[1]. Balakin A.A., Balakina M.A., Permitin G.V., Smirnov A.I., Wave beams in smoothly
inhomogeneous anysotropic and gyrotropic media (aberration-free approximation), Abstracts
of 33 Zvenigorod Conference on Plasma Physics and Controlled Fusion, 2006.
[2]. Smirnov A.I., Petrov E. Yu., in Proc. of 26th EPS Conf. on Contr. Fusion and Plasma Physics,
Maastriht, 14 – 18.06.99, 1999, ECA Vol. 23J, 1797.
[3]. Permitin G.V., Smirnov A.I., Zh. Eksp. Teor. Fiz., 2001, 119, 16.
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