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Evaluation of the local heat conductivity coefficient by power-modulated electron cyclotron heating in the Wendelstein VII-A Stellarator

H.J. Hartfuss, H. Maassberg, M. Tutter, W VII-A Team, ECRH Group1986年被引用 36Nuclear FusionIF 3出版社

An upper bound for the local electron heat coefficient χ(r) in electron cyclotron heated (ECH) discharges is determined experimentally. The method applied uses power modulation of the ECH and measures the time delay of the electron temperature response as a function of radius by means of a multi-channel radiometer for second-harmonic electron cyclotron emission (ECE). The evaluation is restricted to plasma radii between 3 and 6.5 cm, where the pre-conditions of the method are best verified experimentally. The theoretical transport model considers only processes related to the electron temperature gradient and neglects the dependence of χ on Te.

日本語訳

局所電子熱拡散係数χ(r)の上限値が、電子サイクロトロン加熱(ECH)放電において実験的に決定された。適用された方法は、ECHのパワー変調を用い、第二高調波電子サイクロトロン放射(ECE)用の多チャンネル放射計により、電子温度応答の時間遅れを半径の関数として測定するものである。評価は、この方法の前提条件が実験的に最もよく検証されるプラズマ半径3〜6.5 cmの範囲に限定された。理論輸送モデルは、電子温度勾配に関連する過程のみを考慮し、χのTe依存性は無視している。

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StellaratorElectron cyclotron heatingWendelstein
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