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Lower hybrid current drive at high density on Tore Supra

M. Goniche, V. Basiuk, J. Decker, P.K. Sharma, G. Antar, G. Berger-By, F. Clairet, L. Delpech, A. Ekedahl, J. Gunn2013年被引用 37Nuclear FusionIF 3出版社

Lower hybrid current drive (LHCD) experiments with line-averaged density varying between 1.5 × 1019 and 6 × 1019 m−3 are performed on the Tore Supra tokamak under quasi-steady-state conditions with respect to the fast electron dynamics. The LHCD efficiency is analysed from the fast electron bremsstrahlung (FEB) and electron cyclotron emission (ECE). The effect of plasma equilibrium and particle fuelling is documented. It is concluded that the fast decay of FEB with plasma density could be consistent with simple scaling of the current drive efficiency and FEB. Plasma edge measurements are presented looking for the effect on fast electron emission. In a specific case of particle fuelling, an anomalous decay of the hard x-ray and ECE signals suggests deleterious interaction of the wave with edge plasma.

日本語訳

低混合同軸電流駆動(LHCD)実験を、トア・シュプラ・トカマクにおいて、線平均密度を1.5×10¹⁹から6×10¹⁹ m⁻³の範囲で変化させ、高速電子ダイナミクスに関して準定常状態の条件下で実施した。LHCD効率は、高速電子制動放射(FEB)および電子サイクロトロン放射(ECE)から解析した。プラズマ平衡と粒子供給の影響を記録した。プラズマ密度の増加に伴うFEBの急速な減衰は、電流駆動効率とFEBの単純なスケーリング則と整合し得ると結論づけられた。高速電子放出に対する周辺プラズマの影響を調べるため、プラズマ端部での測定を実施した。特定の粒子供給条件下では、硬X線およびECE信号の異常な減衰が観測され、これは波動と周辺プラズマとの有害な相互作用を示唆している。

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Current driveLower hybridTore SupraLower hybrid current drive
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