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Characterization of tokamak edge turbulence by far-infrared laser scattering and Langmuir probes

C.P. Ritz, D.L. Brower, T.L. Rhodes, R.D. Bengtson, S.J. Levinson, N.C. Luhmann Jr., W.A. Peebles, E.J. Powers1987年被引用 121Nuclear FusionIF 3出版社

The spectra, magnitude and spatial distribution of low-frequency (ω ≪ ωci) density fluctuation have been measured by two independent experimental methods in the edge plasma of the TEXT tokamak. Good agreement between far-infrared laser scattering and Langmuir probe measurements has been achieved and the strengths of each technique are evaluated. Langmuir probes are used to directly determine the particle flux induced by edge fluctuations (Γ ∝ ⟨ñ×B⟩) and collective Thomson scattering permits an extension of these observations to the plasma interior. Results are presented for typical discharge conditions in a tokamak.

日本語訳

TEXTトカマクの周辺プラズマにおいて、低周波(ω ≪ ωci)密度揺動のスペクトル、大きさ、および空間分布を、2つの独立した実験手法により測定した。遠赤外レーザー散乱とラングミュアプローブ測定の間で良好な一致が得られ、各手法の長所が評価された。ラングミュアプローブは、周辺揺動によって誘起される粒子束(Γ ∝ ⟨ñ×B⟩)を直接決定するために使用され、集団トムソン散乱により、これらの観測をプラズマ内部に拡張することが可能となる。典型的なトカマク放電条件に対する結果が提示される。

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