You need JavaScript to view this

Auroral ion beams and ion acoustic wave generation by fan instability

Abstract

Satellite observations indicate that efficient energy transport among various plasma particles and between plasma waves and plasma particles is taking place in auroral ion beam regions. These observations show that two characteristic wave types are associated with the auroral ion beam regions: electrostatic hydrogen cyclotron waves with frequencies above hydrogen gyrofrequency, and low frequency waves with frequencies below hydrogen gyrofrequency. We speculate that the low frequency waves can be ion acoustic waves generated through the fan instability. The presence of a cold background ion component is necessary for the onset of this instability. A cold ion component has been directly observed and has been indirectly suggested from observations of solitary wave structures. The wave-particle interaction during the development of the fan instability results in an efficient ion beam heating in the direction perpendicular to the ambient magnetic field. The fan instability development and the ion beam heating is demonstrated in a numerical particle simulation. 23 refs, 16 figs.
Authors:
Publication Date:
Apr 01, 1996
Product Type:
Technical Report
Report Number:
IRF-234
Reference Number:
SCA: 661300; PA: AIX-28:006315; EDB-97:010578; NTS-97:005623; SN: 97001714092
Resource Relation:
Other Information: PBD: Apr 1996
Subject:
66 PHYSICS; POLAR-CAP AURORAE; ION BEAMS; ION ACOUSTIC WAVES; PLASMA INSTABILITY
OSTI ID:
409646
Research Organizations:
Swedish Inst. of Space Physics, Kiruna (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0284-1703; Other: ON: DE97609818; TRN: SE9600162006315
Availability:
INIS; OSTI as DE97609818
Submitting Site:
SWDN
Size:
32 p.
Announcement Date:

Citation Formats

Vaivads, A. Auroral ion beams and ion acoustic wave generation by fan instability. Sweden: N. p., 1996. Web.
Vaivads, A. Auroral ion beams and ion acoustic wave generation by fan instability. Sweden.
Vaivads, A. 1996. "Auroral ion beams and ion acoustic wave generation by fan instability." Sweden.
@misc{etde_409646,
title = {Auroral ion beams and ion acoustic wave generation by fan instability}
author = {Vaivads, A}
abstractNote = {Satellite observations indicate that efficient energy transport among various plasma particles and between plasma waves and plasma particles is taking place in auroral ion beam regions. These observations show that two characteristic wave types are associated with the auroral ion beam regions: electrostatic hydrogen cyclotron waves with frequencies above hydrogen gyrofrequency, and low frequency waves with frequencies below hydrogen gyrofrequency. We speculate that the low frequency waves can be ion acoustic waves generated through the fan instability. The presence of a cold background ion component is necessary for the onset of this instability. A cold ion component has been directly observed and has been indirectly suggested from observations of solitary wave structures. The wave-particle interaction during the development of the fan instability results in an efficient ion beam heating in the direction perpendicular to the ambient magnetic field. The fan instability development and the ion beam heating is demonstrated in a numerical particle simulation. 23 refs, 16 figs.}
place = {Sweden}
year = {1996}
month = {Apr}
}