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Simultaneous analysis of ECH modulation and sawtooth activity in the plasma core of the RTP tokamak

A. Jacchia, F. De Luca, G.M.D. Hogeweij, G. Gorini, J.A. Konings, N.J. Lopes Cardozo, P. Mantica, M. Peters1994年被引用 10Nuclear FusionIF 3出版社

A model for the interaction between the sawtooth instability (ST) and modulated electron cyclotron heating (MECH) is presented and tested against electron temperature measurements in RTP tokamak plasmas. The simultaneous analysis of the ECH and ST induced heat waves, including the effect of their interaction, allows the extension of the determination of the incremental electron diffusivity (χinc) to the plasma core region. The experimental data can be interpreted, in the typical range of frequencies of the RTP experiment (300-1500 Hz), in terms of a perturbed heat flux with a low (≲0.3 mm2/s) χinc value inside the sawtoothing region and a larger (≈5-6 m2/s) χinc value outside with a sharp transition. A non-adiabatic sawtooth crash model provides a better fit to the RTP sawtooth heat pulse data than does an adiabatic crash model

日本語訳

鋸歯状不安定性(ST)と変調電子サイクロトロン加熱(MECH)との間の相互作用のモデルを提示し、RTPトカマクプラズマにおける電子温度測定に対して検証する。ECHおよびSTによって誘起される熱波の同時解析は、それらの相互作用の効果を含めることにより、増分電子拡散係数(χinc)の決定をプラズマコア領域に拡張することを可能にする。実験データは、RTP実験の典型的な周波数範囲(300-1500 Hz)において、鋸歯状領域内部では低い(≲0.3 mm2/s)χinc値を持ち、外部では鋭い遷移を伴うより大きい(≈5-6 m2/s)χinc値を持つ摂動熱流束の観点から解釈することができる。非断熱的鋸歯状クラッシュモデルは、断熱的クラッシュモデルよりもRTP鋸歯状熱パルスデータにより良い適合を提供する。

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Electron cyclotron heatingSawtooth oscillationRTP
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