Measurement of Small-Scale Density Fluctuation in JIPP T-II Plasma by Millimeter and Sub-Millineter Wave Scattering

概要

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The small-scale density fluctuations have been studied by both millimeter(2 mm) and sub-millimeter (337 zm) wave scattering technique in JIPP T-IIplasmas. Experiments were performed in two types of plasma: tokamak andstellarator plasmas. In both plasmas, the density fluctuations are localized inouter region of the plasma co[tunn, and show the characteristics of the driftwave mode ttu'bulence. The density fluctuation level is rz/n.z1 -1.5'l3 aroundthe plasma edge, and this value is inversely proportional to the mean electrondensity. Further, the dependence of the fluctuation level on the plasma parametersis studied and compared with the scaling law of the energy confinement time ofthe plasma. The diffusion coefficient estimated from the density fluctuation isabout one third of the global diffusion coefficient.
社団法人日本物理学会の論文
1983-04-15