Study on resonant electron cyclotron heating by OSXB double mode conversion at the W7-X stellarator

Electromagnetic waves potentially have been used to heat overdense nuclear fusion plasmas through a double mode conversion from ordinary to slow extraordinary and finally to Electron Bernstein Wave (EBW) modes, OSXB. This scheme is efficient and has not any plasma density limit of electron cyclotron...

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Bibliographic Details
Published in:Nuclear engineering and technology 2018, 50(7), , pp.1106-1111
Main Authors: Adlparvar, S., Miraboutalebi, S., Sadat Kiai, S.M., Rajaee, L.
Format: Article
Language:English
Subjects:
원자력공학
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Summary:Electromagnetic waves potentially have been used to heat overdense nuclear fusion plasmas through a double mode conversion from ordinary to slow extraordinary and finally to Electron Bernstein Wave (EBW) modes, OSXB. This scheme is efficient and has not any plasma density limit of electron cyclotron resonance heating due to cut-off layer. The efficiency of conversion depends on the isotropic launching angles of the microwaves with the plasma parameters. In this article, a two-step mode conversions of OSXB power transmission efficiency affected by the fast extraordinary (FX) loses at upper hybrid frequency are studied. In addition, the kinetic (hot) dispersion relation of a overdense plasma in a full wave analysis of a OSXB in Wendelstein 7X (W7-X) stellarator plasma has been numerically simulated. The influence of plasma dependent parameters such as finite Larmor radius, electron thermal velocity and electron cyclotron frequency are represented. Keywords: Overdense plasma, Wendelstein 7-X stellarator, Electron cyclotron resonance heating, OSXB mode conversion, Numerical experiment
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2018.06.013