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Title: Propagation of microwave beams through the stagnation zone in an inhomogeneous plasma

Abstract

A study is made of the microwave beam evolution due to passing through the stagnation zone, where the group velocity vanishes, thus making the paraxial approximation for the wavefield inappropriate. An extension to the standard beam tracing technique is suggested that allows one to calculate the microwave beam parameters on either branch of its path apart from the stagnation zone, omitting the calculation of the wavefield inside it. Application examples of the extended technique are presented for the case of microwave reflection from the upper hybrid resonance layer in a tokamak plasma.

Authors:
 [1]
  1. Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22614061
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 43; Journal Issue: 1; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM MONITORING; HYBRID RESONANCE; INHOMOGENEOUS PLASMA; MICROWAVE RADIATION; REFLECTION; STAGNATION; TOKAMAK DEVICES

Citation Formats

Tereshchenko, M. A., E-mail: maxt@inbox.ru. Propagation of microwave beams through the stagnation zone in an inhomogeneous plasma. United States: N. p., 2017. Web. doi:10.1134/S1063780X17010123.
Tereshchenko, M. A., E-mail: maxt@inbox.ru. Propagation of microwave beams through the stagnation zone in an inhomogeneous plasma. United States. doi:10.1134/S1063780X17010123.
Tereshchenko, M. A., E-mail: maxt@inbox.ru. Sun . "Propagation of microwave beams through the stagnation zone in an inhomogeneous plasma". United States. doi:10.1134/S1063780X17010123.
@article{osti_22614061,
title = {Propagation of microwave beams through the stagnation zone in an inhomogeneous plasma},
author = {Tereshchenko, M. A., E-mail: maxt@inbox.ru},
abstractNote = {A study is made of the microwave beam evolution due to passing through the stagnation zone, where the group velocity vanishes, thus making the paraxial approximation for the wavefield inappropriate. An extension to the standard beam tracing technique is suggested that allows one to calculate the microwave beam parameters on either branch of its path apart from the stagnation zone, omitting the calculation of the wavefield inside it. Application examples of the extended technique are presented for the case of microwave reflection from the upper hybrid resonance layer in a tokamak plasma.},
doi = {10.1134/S1063780X17010123},
journal = {Plasma Physics Reports},
number = 1,
volume = 43,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2017},
month = {Sun Jan 15 00:00:00 EST 2017}
}