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## 留言板

THE LOWER-HYBRID-DRIFT INSTABILITY IN THE MAGNETOPAUSE

## THE LOWER-HYBRID-DRIFT INSTABILITY IN THE MAGNETOPAUSE

TU CHUAN-YI
• #### Abstract

This paper discussed the lower-hybrid-drift instability in a simple magnetopause structure in which tbe charge separation electric field is completely neutralized and the total pressure is a constant. The magnetic field directions are assumed to be parallel each other crossing the magnetic boundary. The equilibrium distribution functions presented by W. Alpers is used to calculate the growth rate of the LHD instability and the field energy density. The anomalous resistivity is also evaluated. If the thickness of the magnetopause is near two Larmor radius of thermal ions, the instability growth rate is 0.26 ωLH (ωLH is the lower hybrid frequency) and the anomolous resistivity is 10-5 sec. As the thickness increases, the growth rate and the anomalous resistivity decrease rapidly.

#### Cited By

•  [1] Hu Xiaoliang, Liang Hong, Wang Huili. Lattice Boltzmann method simulations of the immiscible Rayleigh-Taylor instability with high Reynolds numbers. Acta Physica Sinica, 2020, 69(4): 1-10. doi: 10.7498/aps.69.20191504
•  Citation:
##### Metrics
• Abstract views:  2133
• Cited By: 0
##### Publishing process
• Received Date:  09 July 1979
• Accepted Date:  12 August 1981
• Published Online:  27 July 2005

## THE LOWER-HYBRID-DRIFT INSTABILITY IN THE MAGNETOPAUSE

• 1. 北京大学地球物理系

Abstract: This paper discussed the lower-hybrid-drift instability in a simple magnetopause structure in which tbe charge separation electric field is completely neutralized and the total pressure is a constant. The magnetic field directions are assumed to be parallel each other crossing the magnetic boundary. The equilibrium distribution functions presented by W. Alpers is used to calculate the growth rate of the LHD instability and the field energy density. The anomalous resistivity is also evaluated. If the thickness of the magnetopause is near two Larmor radius of thermal ions, the instability growth rate is 0.26 ωLH (ωLH is the lower hybrid frequency) and the anomolous resistivity is 10-5 sec. As the thickness increases, the growth rate and the anomalous resistivity decrease rapidly.

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