Ballooning-mirror instability and internally driven Pc 4--5 wave events

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Description

A kinetic-MHD field-aligned eigenmode stability analysis of low frequency ballooning-mirror instabilities has been performed for anisotropic pressure plasma sin the magnetosphere. The ballooning mode is mainly a transverse wave driven unstable by pressure gradient in the bad curvature region. The mirror mode with a dominant compressional magnetic field perturbation is excited when the product of plasma beta and pressure anisotropy (P{sub {perpendicular}}/P{sub {parallel}} > 1) is large. From the AMPTE/CCE particle and magnetic field data observed during Pc 4--5 wave events the authors compute the ballooning-mirror instability parameters and perform a correlation study with the theoretical instability threshold. They find ... continued below

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27 p.

Creation Information

Cheng, C.Z.; Qian, Q.; Takahashi, K. & Lui, A.T.Y. March 1, 1994.

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Description

A kinetic-MHD field-aligned eigenmode stability analysis of low frequency ballooning-mirror instabilities has been performed for anisotropic pressure plasma sin the magnetosphere. The ballooning mode is mainly a transverse wave driven unstable by pressure gradient in the bad curvature region. The mirror mode with a dominant compressional magnetic field perturbation is excited when the product of plasma beta and pressure anisotropy (P{sub {perpendicular}}/P{sub {parallel}} > 1) is large. From the AMPTE/CCE particle and magnetic field data observed during Pc 4--5 wave events the authors compute the ballooning-mirror instability parameters and perform a correlation study with the theoretical instability threshold. They find that compressional Pc 5 waves approximately satisfy the ballooning-mirror instability condition, and transverse Pc 4--5 waves are probably related to resonant ballooning instabilities with small pressure anisotropy.

Physical Description

27 p.

Notes

INIS; OSTI as DE94008838

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  • Other Information: PBD: Mar 1994

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  • Other: DE94008838
  • Report No.: PPPL--2974
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/142542 | External Link
  • Office of Scientific & Technical Information Report Number: 142542
  • Archival Resource Key: ark:/67531/metadc620036

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Creation Date

  • March 1, 1994

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 15, 2016, 7:04 p.m.

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Cheng, C.Z.; Qian, Q.; Takahashi, K. & Lui, A.T.Y. Ballooning-mirror instability and internally driven Pc 4--5 wave events, report, March 1, 1994; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc620036/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.