Electrostatic hiss and the beam driven electron acoustic instability in the dayside polar cusp
Journal Article
·
· Geophys. Res. Lett.; (United States)
In this study it is shown that the upward moving electron beams observed by DE-1 in the dayside polar cusp at 2 to 5 R/sub E/ drive an electrostatic electron acoustic mode, rather than the whistler mode near resonance, as previously concluded. The characteristics of this instability are compared with the properties of hiss in the polar cusp observed by DE-1. The hiss frequencies and funnel shaped frequency-time spectra are consistent with the electron acoustic mode. However, because the hiss often has a fluctuating magnetic field component near the axis of the funnel shape, the hiss is probably composed of both electron acoustic and whistler mode waves.
- Research Organization:
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 6090232
- Journal Information:
- Geophys. Res. Lett.; (United States), Journal Name: Geophys. Res. Lett.; (United States) Vol. 11:12; ISSN GPRLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
640203 -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAL HISS
BEAMS
BOLTZMANN-VLASOV EQUATION
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON PLASMA WAVES
EQUATIONS
INSTABILITY
LEPTON BEAMS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE BEAMS
PLASMA INSTABILITY
PLASMA WAVES
POLAR CUSP
RADIATIONS
WAVE PROPAGATION
Ionospheric
& Magetospheric Phenomena
640203 -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAL HISS
BEAMS
BOLTZMANN-VLASOV EQUATION
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON PLASMA WAVES
EQUATIONS
INSTABILITY
LEPTON BEAMS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE BEAMS
PLASMA INSTABILITY
PLASMA WAVES
POLAR CUSP
RADIATIONS
WAVE PROPAGATION