Computer simulations of basic processes of coherent whistler wave-particle interactions in the magnetosphere

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA087iA06p04435· OSTI ID:6864710

Omura, Y; Matsumoto, H

Basic processes of coherent whistler mode wave-particle interactions in the magnetosphere are studied by self-consistent computer simulations. The wave equations used in the simulation to determine the wave amplitude and frequency are discussed and physical interpretations of them are given. Nonlinear processes of the wave growth in a uniform magnetic field are examined in detail. Difference between uniform (periodic) and nonuniform (encounter) interactions is studied. Taking into account, the inhomogeneity of the dipole geomagnetic filled, we found that untrapped resonant electrons as well as trapped electrons play significant roles in the wave evolution. The roles of trapped and untrapped electrons are different and exchange their roles depending on the sign of the geomagnetic gradient. In the hemisphere where the whistler wave propagates toward the equator, trapped electrons cause wave growth, while untrapped resonant electrons cause wave damping. In the opposite hemisphere, these roles are exchange. Four simulations are carried out to demonstrate these differences separately.

• Research Organization: Radio Atmospheric Science Center Kyoto University, Uji, Kyoto 611 Japan
• OSTI ID: 6864710
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 87:A6; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
DIFFERENTIAL EQUATIONS
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
EQUATIONS
INTERACTIONS
MAGNETOSPHERE
NOISE
NONLINEAR PROBLEMS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PLASMA WAVES
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
SIMULATION
WAVE EQUATIONS
WHISTLERS