Convective growth of broadband turbulence in the plasma sheet boundary layer

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA092iA03p02560· OSTI ID:5557742

B, Dusenbery P ^[1]

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1. Univ. of Colorado, Boulder (United States)

Convective growth of slow and fast beam acoustic waves in the plasma sheet boundary layer (PSBL) is investigated. It has been shown previously that a could ion population must be present in order to excite beam acoustic waves in the PSBL. However, growth rates are significantly enhanced when warm plasma sheet boundary layer ions are present. Net wave growth along a ray path is determined by convective growth. This quantity is calculated for particle distribution models consistent with the PSBL where the intensity of broadband turbulence is observed to peak. Total number density dependence on beam acoustic convective growth is evaluated, and it is found that even for low density conditions of {approximately}0.01 cm{sup {minus}3}, a measurable level of broadband turbulence is expected. Relative drift effects between cold and warm ion populations are also considered. In particular, it is found that slow mode convective growth can be enhanced when slowly streaming cold ions are present, compared to fast ion streams.

• OSTI ID: 5557742
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 92:A3; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
BOUNDARY LAYERS
CORRELATIONS
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
INSTABILITY
ION BEAMS
IONIC COMPOSITION
LAYERS
MAGNETOTAIL
ORIGIN
PLASMA DENSITY
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA SHEET
PLASMA WAVES
SATELLITES
TURBULENCE