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Investigation of ion instability exhibiting a broadband continuous spectrum in electron cyclotron resonance magnetic nozzle

文献类型：期刊论文

作者Guo, Honghui5; Yang, Zhi5; Liu, Hongtao4; Cao, Yong5; Bai, Jinwei2,3; Hu, Yuan1
刊名VACUUM
出版日期2025-12-01
卷号242页码:14
关键词Magnetic nozzle Dispersion relation Plasma instability measurements Growth rate
ISSN号0042-207X
DOI10.1016/j.vacuum.2025.114717
通讯作者Cao, Yong(yongc@hit.edu.cn) ; Bai, Jinwei(baijinwei@sztu.edu.cn) ; Hu, Yuan(yhu@imech.ac.cn)
英文摘要Instabilities in electron cyclotron resonance (ECR) magnetic nozzles are investigated through both theoretical analysis and experimental observation. An analytical dispersion relation for instabilities is derived using a two-fluid model. Experimentally, an instability measurement system employing fixed probe pairs is utilized to detect the presence of instabilities within the magnetic nozzle. Additionally, time-averaged plasma parameters inside the magnetic nozzle are measured for theoretical analysis of instabilities. By integrating the theoretical dispersion analysis with experimental instability measurements and plasma diagnostics, the influence of electromagnetic fields on the observed azimuthal instabilities is examined. The results reveal that the maximum growth rate (gamma(max)) of the azimuthal instability decreases while the corresponding wavelength increases with the divergence angle of the magnetic field, defined as tan-1(Bx/Bz). As for the electric field effects, ,max increases with a stronger parallel electric field E-vertical bar vertical bar along the magnetic field lines, whereas the corresponding wavelength becomes shorter. In contrast, the perpendicular electric field E-vertical bar vertical bar shows negligible influence on the instability. These findings suggest that maintaining the magnetic field divergence angle between 30 degrees and 45 degrees, along with reducing the magnetic field gradient, can effectively suppress azimuthal instabilities in ECR magnetic nozzles.
WOS关键词LANGMUIR PROBE DATA ; TRANSPORT ; PARAMETRIZATION ; TURBULENCE ; DRIFT
资助项目National Key R&D Program of China[2023YFA1608400] ; PostDoctoral Fellowship from Research Foundation-Flanders (FWO)[1252224N] ; Guangdong Basic and Applied Basic Research Foundation[2023A1515010137] ; Shenzhen Technology Project[GJHZ20220913143010019] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA0380602]
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:001574381500001
资助机构National Key R&D Program of China ; PostDoctoral Fellowship from Research Foundation-Flanders (FWO) ; Guangdong Basic and Applied Basic Research Foundation ; Shenzhen Technology Project ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://dspace.imech.ac.cn/handle/311007/104116]  
专题力学研究所_高温气体动力学国家重点实验室
通讯作者Cao, Yong; Bai, Jinwei; Hu, Yuan
作者单位1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China
2.Shenzhen Technol Univ, Coll Engn Phys, Shenzhen 518118, Peoples R China
3.Shenzhen Technol Univ, Ctr Intense Laser Applicat Technol, Shenzhen Key Lab Ultraintense Laser & Adv Mat Tech, Shenzhen 518118, Peoples R China
4.Katholieke Univ Leuven, Ctr Math Plasma Astrophys, Dept Math, B-3001 Leuven, Belgium
5.Harbin Inst Technol Shenzhen, Sch Mech Engn & Automat, Shenzhen 518055, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Honghui,Yang, Zhi,Liu, Hongtao,et al. Investigation of ion instability exhibiting a broadband continuous spectrum in electron cyclotron resonance magnetic nozzle[J]. VACUUM,2025,242:14.
APA Guo, Honghui,Yang, Zhi,Liu, Hongtao,Cao, Yong,Bai, Jinwei,&Hu, Yuan.(2025).Investigation of ion instability exhibiting a broadband continuous spectrum in electron cyclotron resonance magnetic nozzle.VACUUM,242,14.
MLA Guo, Honghui,et al."Investigation of ion instability exhibiting a broadband continuous spectrum in electron cyclotron resonance magnetic nozzle".VACUUM 242(2025):14.

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来源：力学研究所

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