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Effects of polarization change on the measurement of electron temperature profile from ECE in tokamak plasma

M. Sato, N. Isei, A. Isayama, S. Ishida2001年Fusion Engineering and DesignIF 1.7出版社

AbstractIn order to investigate the effect of polarization change on measurements of electron temperature profile from electron cyclotron emission (ECE) in a tokamak plasma, we have calculated the spatial evolution of the electric field of ECE propagating in the plasma. In the case of almost on-axis propagation, the Boyd's prediction is a good approximation, that is, the electric vector rotates with magnetic field. On the other hand, along horizontal sight line far from the axis the Boyd's prediction has a discrepancy of 3% from the numerical results. The effect of the polarization change is important for the measurement of ECE imaging in large tokamaks.

日本語訳

抄録:トカマクプラズマにおける電子サイクロトロン放射(ECE)の電子温度分布測定に対する偏光変化の影響を調査するため、プラズマ中を伝播するECEの電場の空間発展を計算した。ほぼ軸上伝播の場合、ボイドの予測は良い近似であり、すなわち電場ベクトルは磁場とともに回転する。一方、軸から離れた水平視線に沿った場合、ボイドの予測は数値結果と3%の差異を示す。大型トカマクにおけるECEイメージング測定には、偏光変化の影響が重要である。

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Electron cyclotron emission
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