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Plasma losses from mirror trap, initiated by microwave radiation under electron cyclotron resonance conditions

D A Mansfeld, A V Vodopyanov, M D Tokman, N D Kirukhin, D I Yasnov, V E Semenov2018年Plasma Physics and Controlled FusionIF 2.2出版社

Plasma of a stationary electron cyclotron resonance (ECR) discharge sustained by gyrotron radiation at a frequency of 24 GHz and a power of up to 300 W in a mirror magnetic trap was studied. At pressures near the gas breakdown threshold, the extinction effect of an electron cyclotron discharge is observed with increasing radiation power. When the cyclotron resonance cross-section approaches the magnetic plug, the power threshold corresponding to the discharge extinction decreases. These experimental results confirm the presence of the effect of particles precipitation from the trap as a result of ECR interaction with gyrotron radiation. The experimental scaling of the extinction power dependence on the position of the ECR cross-section in a magnetic trap corresponds to the results of the estimates on the basis of the theory of particle precipitation in the quasilinear diffusion regime.

日本語訳

周波数24 GHz、出力最大300 Wのジャイロトロン放射によって維持される静止電子サイクロトロン共鳴(ECR)放電のプラズマを、磁気ミラー磁場中で研究した。ガス破壊閾値付近の圧力では、放射出力の増加に伴い電子サイクロトロン放電の消滅効果が観測された。サイクロトロン共鳴断面が磁気プラグに近づくにつれて、放電消滅に対応する出力閾値は低下する。これらの実験結果は、ジャイロトロン放射とのECR相互作用による磁気トラップからの粒子降下効果の存在を確認するものである。磁気トラップ内のECR断面位置に対する消滅出力の実験的スケーリングは、準線形拡散領域における粒子降下の理論に基づく推定結果と一致する。

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Cyclotron resonanceElectron cyclotron resonance
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