Study of Bridging of the Spectral Gap in the Lower Hybrid Wave Current Drive in the HT-7 Tokamak

• 作 者: 王茂 丁伯江 徐旵东 赵连敏 刘亮 林士耀 许平 孙有文 胡怀传 杨永 贾华 王晓洁 王冬霞 秦永亮 冯建强 刘甫坤 单家方 赵燕平
• 机 构: Institute of Plasma Physics,Chinese Academy of Sciences,HT-7 team,
• 出 处: Plasma Science and Technology
• 发表日期: 2009年05期
• 关键词: bridged suppressed moved outer Lower refractive oscillation bridging sized filli

An additional lower hybrid wave (LHW) with a higher refractive index (N_∥) wasinvestigated in the HT-7 tokamak to bridge the spectral gap. It was found that the spectralgap between the wave and the electrons in the outer region was bridged by the additional wavewith a higher N_∥ spectrum. The results showed that the sawteeth oscillation was suppressed bylaunching the additional wave, and that the power deposition profile was moved outwards and thecurrent profile was broadened due to the application of the additional wave. Our study indicatesthat the spectral gap may be bridged by an additional wave with a higher N_∥ spectrum in theouter region.

An additional lower hybrid wave (LHW) with a higher refractive index (N_ //) was investigated in the HT-7 tokamak to bridge the spectral gap. It was found that the spectral gap between the wave and the electrons in the outer region was bridged by the additional wavewith a higher N_∥ spectrum. The results showed that the sawteeth oscillation was suppressed bylaunching the additional wave, and that the power deposition profile was moved outwards and the current profile was broadened due to the application of the additional wave. Our study indicatesthat the spectral gap may be bridged by an additional wave with a higher N_∥ spectrum in theouter region.