Experimental studies on the propagation of whistler-mode waves in a magnetized plasma structure with a non-uniform density

Longlong SANG; Quanming LU; Jinlin XIE; Qiaofeng ZHANG; Weixing DING; Yangguang KE; Xinliang GAO; Jian ZHENG

doi:10.1088/2058-6272/acc502

Plasma Science and Technology > 2023 > 25(9): 095301. > DOI: 10.1088/2058-6272/acc502

Longlong SANG, Quanming LU, Jinlin XIE, Qiaofeng ZHANG, Weixing DING, Yangguang KE, Xinliang GAO, Jian ZHENG. Experimental studies on the propagation of whistler-mode waves in a magnetized plasma structure with a non-uniform density[J]. Plasma Science and Technology, 2023, 25(9): 095301. DOI: 10.1088/2058-6272/acc502

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Experimental studies on the propagation of whistler-mode waves in a magnetized plasma structure with a non-uniform density

1.
Deep Space Exploration Laboratory, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, People's Republic of China
2.
CAS Center for Excellence in Comparative Planetology, CAS Key Laboratory of Geospace Environment, University of Science and Technology of China, Hefei 230026, People's Republic of China
3.
Collaborative Innovation Center of Astronautical Science and Technology, Harbin 150001, People's Republic of China
4.
CAS Key Laboratory of Geospace Environment, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, People's Republic of China

More Information

Corresponding author:
Quanming LU, E-mail: qmlu@ustc.edu.cn

Jinlin XIE, E-mail: jlxie@ustc.edu.cn
Received Date: September 25, 2022
Revised Date: February 22, 2023
Accepted Date: March 15, 2023
Available Online: December 05, 2023
Published Date: May 18, 2023

Graphical Abstract

Abstract

Abstract

Propagation of whistler-mode waves in a magnetized plasma structure is investigated in the Keda linear magnetized plasma device. The magnetized plasma structure has its density peak in the center, and the background magnetic field is homogeneous along the axial direction. A whistler-mode wave with a frequency of 0.3 times of electron cyclotron frequency (f_ce) is launched into the plasma structure. The wave normal angle (WNA) is about 25°, and the wavefront exhibits a wedge structure. During propagation of the whistler wave, both the propagating angle and WNA slowly approach zero, and then the wave is converged toward the center of the structure. Therefore, the wave tends to be trapped in the plasma structure. The results present observational evidence of the propagation of a whistler-mode wave trapped in the enhanced-density structure in a laboratory plasma. This trapping effect is consistent with satellite observations in the inner magnetosphere.
- whistler wave,
- laboratory plasma,
- density duct

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Acknowledgments

This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB 41000000), the Key Research Program of Frontier Sciences, CAS (No. QYZDJ-SSW-DQC010), and Fundamental Research Funds for the Central Universities (Nos. WK3420000006, WK3420000013, WK3420000017 and WK2080000135).

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