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Analysis of electron heat transport with off-axis modulated ECRH in Tore Supra

S.D. Song, X.L. Zou, G. Giruzzi, W.W. Xiao, X.T. Ding, B.J. Ding, J.L. Ségui, D. Elbèze, F. Clairet, C. Fenzi2012年Nuclear FusionIF 3出版社

Experiments to study inward heat transport phenomena have been performed in the Tore Supra tokamak with off-axis electron cyclotron resonance heating (ECRH). Both power balance and perturbation transport analysis have been done for low-frequency (1 Hz) ECRH modulation experiments. Heat diffusivity and heat pinch have been separately determined by fitting the experimental data of the amplitude and phase of the Fourier transform of the modulated temperature with a linear transport model including convection term. Comparison with the critical gradient model has shown that the heat pinch previously obtained could include a pseudo-pinch due to the non-linearity of the diffusivity and an additional non-diffusive heat pinch. The pinch effect is reduced for higher densities.

日本語訳

Tore Supraトカマクにおいて、オフアクシス電子サイクロトロン共鳴加熱(ECRH)を用いた内向き熱輸送現象を研究するための実験が実施された。低周波数(1 Hz)ECRH変調実験に対して、パワーバランス解析と摂動輸送解析の両方が行われた。熱拡散係数と熱ピンチは、線形輸送モデルに対流項を含めたモデルを用いて、変調温度のフーリエ変換の振幅と位相の実験データをフィッティングすることにより、それぞれ独立に決定された。臨界勾配モデルとの比較により、以前得られた熱ピンチには、拡散係数の非線形性による擬似ピンチと、追加の非拡散性熱ピンチが含まれ得ることが示された。ピンチ効果は高密度において減少する。

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Electron cyclotron heatingTore SupraHeat transportElectron heat transport
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