Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsa21a0287b&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SA21A-0287
Physics
2716 Energetic Particles: Precipitating, 2720 Energetic Particles: Trapped, 2778 Ring Current, 2788 Magnetic Storms And Substorms (7954)
Scientific paper
Plasma wave data from the ISIS-1, ISEE-1, DE-1, and CLUSTER spacecraft suggest that the magnetosphere from L = 2 to L = 7 is commonly populated by small scale ( 2 - 100 m), small amplitude (0.1 - 1%) magnetic field aligned plasma density irregularities. Whistler mode waves propagating through regions containing these irregularities are commonly observed to excite lower hybrid waves through linear mode coupling as the irregularities scatter the whistler mode waves. During periods of magnetic disturbance intense whistler mode waves, such as ELF/VLF chorus, are generated near the magnetic equatorial plane on L shells in the range 3 - 7 and propagate towards lower latitudes. It can be expected that the intense chorus waves will also excite intense lower hybrid waves through linear mode coupling as the chorus waves propagate through regions containing the small scale irregularities. The excited lower hybrid waves generally have the appropriate phase velocities to interact with ring current protons through the transverse Landau resonance. In the present paper we calculate the pitch angle scattering of ring current protons due to transverse Landau interactions with lower hybrid waves excited through linear mode coupling during magnetically disturbed periods. We find the conditions under which this interaction could play an important role in determining the life time of ring current protons.
Bell Timothy F.
Inan Umran S.
Platino M.
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