Filters
Results 1 - 1 of 1
Results 1 - 1 of 1.
Search took: 0.019 seconds
Johnson, J.R.; Cheng, C.Z.
Princeton Univ., Princeton Plasma Physics Lab., NJ (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1996
Princeton Univ., Princeton Plasma Physics Lab., NJ (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1996
AbstractAbstract
[en] A global stability analysis of mirror modes in the magnetosheath is presented. The analysis is based upon the kinetic-MHD formulation which includes relevant kinetic effects such as Landau resonance and gradient drift effects related to inhomogeneities in the background density, temperature, pressure and its anisotropy, magnetic field, and plasma flow velocity. Pressure anisotropy provides the free energy for the global mirror mode. The local theory of mirror modes predicts purely growing modes confined in the unstable magnetosheath region; however, the nonlocal theory that includes the effects of gradients and plasma flow predicts modes with real frequencies which propagate with the flow from the magnetosheath toward the magnetopause boundary. The real frequency is on the order of a combination of the diamagnetic drift frequency and the Doppler shift frequency associated with plasma flow. The diamagnetic drift frequency provides a wave phase velocity in the direction of the magnetopause so that wave energy accumulates against the magnetopause boundary, and the amplitude is skewed in that direction. On the other hand, plasma flow also gives rise to a real phase velocity, but the phase velocity is smaller than the flow velocity. As a result, the wave amplitude is increased in the wake of the plasma flow and piles up against the bow shock boundary
Primary Subject
Source
1996; 26 p; CONTRACT AC02-76CH03073; ALSO AVAILABLE FROM OSTI AS DE97050299; NTIS; INIS; ALSO AVAILABLE FROM THE FOLLOWING URL: HTTP://WWW.PPPL.GOV. SEE PPPL REPORTS SECTION FOR FULL TEXT.; US GOVT. PRINTING OFFICE DEP
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue