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Effect of alternating electric field on diffusion of weakly collisional plasma in ℓ = 1 Vint-20 torsatron

V.S. Vojtsenya, A.Yu. Voloshko, S.I. Solodovchenko, A.F. Shtan'1981年被引用 5Nuclear FusionIF 3出版社

The experiments were carried out on the Vint-20 ℓ = 1 torsatron with a magnetic configuration characterized by large field inhomogeneity. Alternating electric field with a broad spectrum (Δf ∼ 2 MHz) were excited in the frequency range 2–30 MHz in a microwave discharge plasma with a density ≳ 109 cm−3, an electron temperature ∼ 5 eV, and cold ions. Superbanana diffusion was reduced as a result of the effect on the trapped electrons, and this was reflected in a three-to-fivefold increase in plasma density. The largest decrease in superbanana diffusion was observed at excitation field frequencies 3–4 times greater than the theoretical oscillation frequency value for electrons located between adjacent magnetic mirrors.

日本語訳

実験は、大きな磁場不均一性を特徴とする磁気配位を有するVint-20 ℓ = 1トルサトロンにおいて実施された。周波数2〜30 MHzの範囲で、広帯域スペクトル(Δf ∼ 2 MHz)を有する交流電界が、密度≳ 10⁹ cm⁻³、電子温度∼ 5 eV、冷イオンを有するマイクロ波放電プラズマ中で励起された。捕捉電子に対するこの効果の結果として、スーパーバナナ拡散が低減され、これはプラズマ密度の3〜5倍の増加として反映された。スーパーバナナ拡散の最大の低減は、隣接する磁気ミラー間に位置する電子の理論的な振動周波数値の3〜4倍の励起電界周波数において観測された。

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Collisional plasma
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