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arXiv physics/0410088physics.plasm-ph
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FT-2托卡马克低杂波加热下LCFS附近粒子涨落感应通量的极向不均匀性和改进的约束跃迁

Poloidal inhomogeneity of the particle fluctuation induced fluxes near of the LCFS at lower hybrid heating and improved confinement transition at the FT-2 tokamak

Sergei Lashkul, Sergei Shatalin, Alexei Altukhov, Alexei Gurchenko, Evgenii Gusakov, Valerii Dyachenko, Lev Esipov, Mihail Kantor, Denis Kouprienko, Alexsandr S… 展开作者

Sergei Lashkul, Sergei Shatalin, Alexei Altukhov, Alexei Gurchenko, Evgenii Gusakov, Valerii Dyachenko, Lev Esipov, Mihail Kantor, Denis Kouprienko, Alexsandr Stepanov, Andrei Sharpeonok, Elena Vekshina

摘要:

本文介绍了FT-2的光谱和微湍流实验数据及其分析。结果表明,FT-2中LH加热(LHH)产生的径向电场Er足以形成输运势垒。当LHH关闭时,ETB形成。在两个不同的极向角下,测量了太阳光LCFS附近的径向涨落引起的E B漂移通量密度。为此目的,使用两个朗缪尔探针位于低场和高场侧的环面。登记的极向和径向分量的电场和密度波动在同一时间在一个放电允许测量的极向不对称的传输减少机制的径向和极向粒子通量在SOL中。绝对E(~)涨落水平与Er切变的符号有关。用X模起伏反射法研究了LCFS附近L-H跃迁中极向ErxB旋转剪切E-B对微尺度湍流的影响。新的数据是通过空间光谱技术获得的。

英文摘要:

This paper deals with the new spectral and microturbulence experimental data and their analysis, which show, that the radial electric field Er generated at the LH heating (LHH) in the FT-2 is high enough to form the transport barriers. The ETB is formed when LHH is switched off. The radial fluctuation-induced EB drift flux densities near LCFS in SOL are measured at two different poloidal angles. For this purpose two Langmuir probes located at low and high field sides of the torus are used. Registration of the poloidal and radial components of the electric field and density fluctuations at the same time during one discharge permits to measure the poloidal asymmetry of the transport reduction mechanism of the radial and poloidal particle fluxes in the SOL. The absolute E(~) fluctuation levels show dependence on the sign of Er shear. The modification of the microscale turbulence by the poloidal Er x B rotation shear EB at the L - H transition near LCFS is also studied by X-mode fluctuation Reflectometry. The new data were obtained by spatial spectroscopic technique.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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