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Principles for local measurement of anisotropic electron temperature of plasma using incoherent Thomson scattering

E. Yatsuka, T. Hatae, Y. Kusama2011年被引用 11Nuclear FusionIF 3出版社

Anisotropic electron temperature can be measured by utilizing two Thomson scattering spectra from different scattering angles. The ideal conditions for measurement are as follows: the sum of the two scattering angles is 180°, and the magnetic field is parallel to the bisector of the angle formed by the direction of laser propagation and the line of sight or is perpendicular to this bisector. When these conditions are satisfied, one of the spectra predominantly reflects the parallel electron temperature, and the other spectrum predominantly reflects the perpendicular electron temperature. A deviation in the direction of magnetic field of the order of approximately a few tens of degrees from the ideal direction is acceptable in terms of the deviation obtained by both rotating parallel to and tilting from the scattering plane.

日本語訳

異方的電子温度は、異なる散乱角における2つのトムソン散乱スペクトルを利用することによって測定することができる。測定の理想的な条件は以下の通りである:2つの散乱角の和が180°であり、かつ磁場がレーザー伝播方向と視線方向がなす角の二等分線に平行であるか、またはこの二等分線に垂直であること。これらの条件が満たされるとき、一方のスペクトルは主に平行電子温度を反映し、他方のスペクトルは主に垂直電子温度を反映する。理想的な方向からの磁場方向の偏差は、散乱面に対して平行に回転した場合と散乱面から傾いた場合の両方で得られる偏差の観点から、おおよそ数十度程度まで許容可能である。

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