Observation of Multiple Broadband Alfvenic Chirping Modes in HL-2A NBI Plasmas

被引：5
|
作者：
Yu, Liming [1 ]
Chen, Wei [1 ]
Ji, Xiaoquan [1 ]
Shi, Peiwan [2 ]
Ding, Xuantong [1 ]
Shi, Zhongbing [1 ]
Ma, Ruirui [1 ]
Hou, Yumei [1 ]
Li, Yonggao [1 ]
Li, Jiaxian [1 ]
Cao, Jianyong [1 ]
Zhong, Wulyu [1 ]
Xu, Min [1 ]
Duan, Xuru [1 ]
机构：
[1] Southwestern Inst Phys, Chengdu 610041, Peoples R China
[2] Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2021年 / 38卷 / 05期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
INTERNAL KINK; INSTABILITY; DRIVEN; IONS;
D O I：
10.1088/0256-307X/38/5/055202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Multiple broadband Alfvenic chirping modes (CMs), with frequencies in the wide range of f similar to 35-150 kHz and chirping down rapidly, are found in HL-2A neutral beam injection plasmas, and the CMs can even coexist. The frequency chirping down process can be completed within similar to 1 ms, and the frequency shift can reach 30-50 kHz. The CMs propagate in ion diamagnetic drift directions poloidally. The toroidal mode number is confirmed to be n = 1, 2, 3 and 4 for the f similar to 35-65, 55-90, 70-120 and 100-150 kHz CMs, respectively. The CMs are more like to be energetic-particle continuum modes (EPMs), since the modes almost locate on the Alfven continuum.
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页数：5
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