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Electron Bernstein wave heating and emission via the OXB process at W7-AS

H P Laqua, the W7-AS Team, the ECRH Group1999年Plasma Physics and Controlled FusionIF 2.2出版社

The access to overdense plasmas for both the electron Bernstein (EB) wave heating and the EB wave diagnostic via the O-X-B mode conversion window was successfully demonstrated at W7-AS. In the EB wave heating experiments clear evidence for both mode conversion steps were detected and resonant absorption with a narrow profile was demonstrated. Also, the inverse process, the EB wave radiation of an overdense plasma was measured with an oblique viewing angle. The spectrum consists of a local cyclotron emission part and a non-local broadband high-frequency part. Edge temperature perturbations excited by carbon injection were used to demonstrate the relation between frequency and position of emission. Since for EB waves no density limit exists, the operation window of the electron cyclotron heating and diagnostic could be extended to densities above the cut off density.

日本語訳

高密度プラズマへのアクセスは、O-X-Bモード変換窓を介した電子バーンスタイン(EB)波加熱およびEB波診断の両方において、W7-ASで成功裏に実証された。EB波加熱実験では、両方のモード変換ステップの明確な証拠が検出され、狭い共鳴吸収が実証された。また、その逆過程である、斜め視野角による高密度プラズマからのEB波放射も測定された。そのスペクトルは、局所的な電子サイクロトロン放射成分と、非局所的な広帯域高周波成分から構成される。炭素入射によって励起された周辺部の摂動を用いて、放射の周波数と位置の対応関係が実証された。EB波には密度限界が存在しないため、電子サイクロトロン加熱および診断の動作窓は、遮断密度を超える密度まで拡張することができる。

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Bernstein waveWave heatingW7-ASElectron Bernstein waves
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