BEAM-DENSITY GRADIENT DRIFT INSTABILITIES AND HEATING IN THE PLASMA SHEET BOUNDARY-LAYER

	BEAM-DENSITY GRADIENT DRIFT INSTABILITIES AND HEATING IN THE PLASMA SHEET BOUNDARY-LAYER
	Zhou, G. C. ; Zhu, L. F.
刊名	Journal of Geophysical Research-Space Physics
	1991
卷号	96 期号:A10 页码:17581-17589
关键词	band electrostatic noise earths magnetotail 2nd-order theory ion-beam acoustic instability distant magnetotail isee observations geomagnetic tail magnetic-field neutral sheet
ISSN号	0148-0227
通讯作者	北京8701信箱
英文摘要	The linear and second-order theories of ion beam-density gradient drift instabilities on the outer edge of the inhomogeneous plasma sheet boundary layer (PSBL), with warm current sheet ion beams and cold ionospheric ion beams drifting in opposite directions, are examined. It is shown that combined interactions of ion beams and plasma density gradient drifts can excite electrostatic ion beam-density gradient drift instabilities. These instabilities combine to form the broadband maximum growth rate spectrum with the peak growth rate approximately 0.34-omega-lh at the obliquely propagating low frequency, where omega-lh is the lower hybrid frequency. These linear results can be used to explain the observed broadband electrostatic noise on the outer edge of the PSBL. The calculations for the second-order heating rate show that three particle components in the model may be heated by electrostatic waves which result from ion beam-density gradient drift instabilities. The second-order heating rates for the cold ionospheric ion beams are the highest. The heating rate profiles with respect to the ambient magnetic field for each component are anisotropic and similar to the maximum growth rate profiles. The peak heating rate occurs at the obliquely propagating low frequency which corresponds to the peak growth rate. The second-order heating considered here is due to resonance broadening of weak resonant components. These results may be used to understand transport processes on the outer edge of the PSBL.
学科主题	空间物理
收录类别	SCI
原文出处	://A1991GJ37100002
语种	英语
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/981]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Zhou, G. C.,Zhu, L. F.. BEAM-DENSITY GRADIENT DRIFT INSTABILITIES AND HEATING IN THE PLASMA SHEET BOUNDARY-LAYER[J]. Journal of Geophysical Research-Space Physics,1991,96(A10):17581-17589.
APA	Zhou, G. C.,&Zhu, L. F..(1991).BEAM-DENSITY GRADIENT DRIFT INSTABILITIES AND HEATING IN THE PLASMA SHEET BOUNDARY-LAYER.Journal of Geophysical Research-Space Physics,96(A10),17581-17589.
MLA	Zhou, G. C.,et al."BEAM-DENSITY GRADIENT DRIFT INSTABILITIES AND HEATING IN THE PLASMA SHEET BOUNDARY-LAYER".Journal of Geophysical Research-Space Physics 96.A10(1991):17581-17589.