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Broad wavenumber turbulence and transport during Ohmic and electron cyclotron heating in the DIII-D tokamak

T L Rhodes, W A Peebles, J C DeBoo, R Prater, J E Kinsey, G M Staebler, J Candy, M E Austin, R V Bravenec, K H Burrell2007年Plasma Physics and Controlled FusionIF 2.2出版社

The response of plasma parameters and broad wavenumber turbulence (1–39 cm−1, kρs = 0.1–10, relevant to ion temperature gradient, trapped electron mode and electron temperature gradient mode turbulence, here ρs = ion gyroradius) to auxiliary electron cyclotron heating (ECH) is reported on. One fluid thermal fluxes and diffusivities increase appreciably with ECH. Significant changes to the density fluctuations over the full range of measured wavenumbers are observed, with an increase for lower wavenumbers and a more spatially complicated response at high k. Spatially resolved high k measurements (k = 39 cm−1, kρs = 4–10) show a varying response to ECH, with decreasing at r/a = 0.35 and increasing at r/a = 0.6 and 1. These variations were found to have a positive correlation with ∇Te evaluated at nearby locations, consistent with a ∇Te drive. Comparison of the changes in high k fluctuation levels with linear gyrokinetic growth rates show qualitative agreement at the innermost location, r/a = 0.35 and disagreement at r/a = 0.6.

日本語訳

プラズマパラメータと広波数領域の乱流(1–39 cm⁻¹、kρs = 0.1–10、イオン温度勾配モード、捕捉電子モード、電子温度勾配モード乱流に関連する。ここでρsはイオンジャイロ半径である)に対する補助電子サイクロトロン加熱(ECH)の応答について報告する。単流体熱流束と拡散係数はECHにより顕著に増加する。密度ゆらぎは測定された全波数範囲にわたって有意な変化を示し、低波数では増加し、高波数ではより空間的に複雑な応答が見られる。空間分解された高波数測定(k = 39 cm⁻¹、kρs = 4–10)では、ECHに対する応答が変化し、r/a = 0.35では減少し、r/a = 0.6および1では増加することが示された。これらの変動は、近傍の∇Teで評価された値と正の相関を示し、∇Te駆動と一致する。高波数におけるゆらぎレベルの変化と線形ジャイロ運動論的成長率との比較では、最も内側の位置r/a = 0.35では定性的に一致し、r/a = 0.6では不一致が見られた。

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diii-d高精度(タイトル一致)

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DIII-DElectron cyclotron heatingOhmic heating
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