Abstract

The enhancement in local and globalized electron heating has been observed after upgrading of ion Bernstien waves (IBWs) heating system in HT-7 tokamak. The overall capability of injection power has been upgraded from 350 to 600 kW (15–30 MHz) for best and active control of pressure and current density profiles, and to discover the new phenomena of plasma heating for good energy and particle confinement. A new quadruple T-type IBWs coupling antenna has been utilized which has been mounted in the toroidal direction on low field side in the device. The electron heating on both on-axis and off-axis electrons not delete has been observed. Not delete The change in direct electron heating via electron Landau damping (ELD) from IBWs has been investigated, while the bulk electron temperature showed a large rise with a heating factor, ∆(T_en_e)/P_rf, up to 9.3 × 10¹⁹ eV m^–3 kW^–1 with central electron density (n_e) 3.7 × 10¹⁹ m^–3. The particle confinement has also been achieved with IBW injection power of 550 kW at frequency of 27 MHz and with toroidal magnetic field of 1.92 T. The modifications observed in electron temperature and other plasma profiles are discussed under various plasma conditions. The improved energy confinement has also been observed in this scenario.

中文翻译：

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HT-7托卡马克中IBW加热系统功率的提升对等离子体轮廓的修改

摘要

在升级HT-7托卡马克中的离子Bernstien波（IBWs）加热系统后，已观察到局部和全局电子加热的增强。注入功率的整体能力已从350 kW升级到600 kW（15–30 MHz），以最佳，主动地控制压力和电流密度曲线，并发现等离子体加热的新现象，从而实现了良好的能量和颗粒限制。已经使用了一种新的四重T型IBWs耦合天线，该天线已以环形方向安装在设备的低场侧。已经观察到在轴上和轴外电子上的电子加热都没有消失。未删除已研究了来自IBW的通过电子Landau阻尼（ELD）进行的直接电子加热的变化，而体电子温度随加热因子∆（Ť _ë Ñ _ë）/ P _RF，最多9 。3×10 ¹⁹电子伏特米^-3千瓦^-1与中央电子密度（Ñ _ë）3.7×10 ¹⁹米^-3。还通过在27 MHz频率下以550 kW的IBW注入功率和1.92 T的环形磁场实现了粒子限制。讨论了在各种等离子体条件下观察到的电子温度和其他等离子体分布的变化。在这种情况下，还可以观察到改善的能量限制。