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The poloidal variation of the radial transport due to electrostatic fluctuations in toroidal magnetic confinement experiments

M Endler1999年Plasma Physics and Controlled FusionIF 2.2出版社

The `anomalous' radial transport in the plasma edge is generally thought to be largely due to correlated fluctuations of plasma density, temperature and potential. Experimental results show that fluctuations of these quantities are highly correlated, in phase and of constant amplitude parallel to the magnetic field. The resulting transport is often described by diffusive terms, using anomalous transport coefficients. The objective of this paper is to show that, in keeping with the high correlation and constant amplitude of the fluctuations along the magnetic field, the transport coefficients should scale as the square of the flux expansion (i.e. the separation between magnetic flux surfaces) along a magnetic flux tube in order to describe the fluctuation-induced transport correctly.

日本語訳

プラズマ端部における「異常」径方向輸送は、一般に、プラズマ密度、温度、および電位の相関した揺動に主に起因すると考えられている。実験結果は、これらの量の揺動が、磁場に平行な方向において高度に相関し、同位相であり、振幅が一定であることを示している。結果として生じる輸送は、しばしば異常輸送係数を用いた拡散項によって記述される。本論文の目的は、磁場に沿った揺動の高い相関性と一定振幅に整合するように、揺動誘起輸送を正しく記述するためには、輸送係数が磁気フラックスチューブに沿ったフラックス膨張(すなわち、磁気フラックス面間の間隔)の二乗に比例してスケールすべきであることを示すことである。

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Magnetic confinementRadial transport
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