Investigation of the fast magnetosonic wave excited by the Alfvén wave phase mixing by using the Hall–MHD model in inhomogeneous plasma

Zhongzheng LI (李中正); Juanfang HAN (韩娟芳); FangpingWANG (王芳平); Zhengwu CHEN (陈正武); Wenshan DUAN (段文山)

doi:10.1088/2058-6272/abe10b

Plasma Science and Technology > 2021 > 23(3): 35003-035003. > DOI: 10.1088/2058-6272/abe10b

Zhongzheng LI (李中正), Juanfang HAN (韩娟芳), FangpingWANG (王芳平), Zhengwu CHEN (陈正武), Wenshan DUAN (段文山). Investigation of the fast magnetosonic wave excited by the Alfvén wave phase mixing by using the Hall–MHD model in inhomogeneous plasma[J]. Plasma Science and Technology, 2021, 23(3): 35003-035003. DOI: 10.1088/2058-6272/abe10b

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Investigation of the fast magnetosonic wave excited by the Alfvén wave phase mixing by using the Hall–MHD model in inhomogeneous plasma

1 College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, People’s Republic of China
2 Department of Physics, Gansu Normal College For Nationalities, Hezuo 747000, People’s Republic of China

Funds: This research was supported by National Natural Science Foundation of China (Nos. 11 965 019, 42 004 131 and 61 863 032).

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Received Date: November 16, 2020
Revised Date: January 27, 2021
Accepted Date: January 27, 2021

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Abstract

Abstract

The inhomogeneity is introduced by a nonzero density gradient which separates the plasma into two different regions where plasma density are constant. The Alfvén waves, the phase mixing and the fast magnetosonic wave are excited by the boundary condition in inhomogeneous magnetized plasma. By using the Hall–magnetohydrodynamics (MHD) model, it is found that there are Alfvén waves in the homogeneous regions, while the phase mixing appears in the inhomogeneous region. The interesting result is that a fast magnetosonic wave is excited in a different direction which has a nonzero angle between the wave propagation direction and the direction of the background magnetic field. The dependence of the propagation direction of the excited fast magnetosonic wave and its strength of the magnetic field on the plasma parameters are given numerically. The results show that increasing both the driving frequency and the ratio of magnetic pressure to thermal pressure will increase the acceleration of the electrons. The electron acceleration also depends on the inhomogeneity parameters.
- Hall–MHD,
- Alfvén wave,
- phase mixing,
- numerical simulations,
- fast magnetosonic wave

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References

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Investigation of the fast magnetosonic wave excited by the Alfvén wave phase mixing by using the Hall–MHD model in inhomogeneous plasma