Role of hydromagnetic waves in the magnetosphere and the ionosphere. Final report, 1 Feb 88-31 Jan 91

Technical Report · Thu Jan 31 04:00:00 EST 1991

OSTI ID:5318811

Kuo, S

Four research areas were investigated: (1) the propagation and coupling of hydromagnetic waves in the magnetosphere. The coupled hydromagnetic equations in the dipole model of the magnetosphere were solved numerically. A reconstruction of the long period waves in an actual geomagnetic storm was demonstrated (2) non-linear wave-particle interactions in the magnetosphere. Anomalous cross-field diffusion of trapped energetic protons may result in proton precipitation in the equatorial region; (3) the filamentation instability of large amplitude hydromagnetic waves in the solar wind plasma. This work is relevant to observations of Alven waves and magnetosonic waves in space plasmas; (4) parametric excitation of whistler waves in the high latitude ionosphere by a high frequency heater transmitting from the ground. It has been shown that whistler waves and Langmuir waves can be excited by ionospheric heaters. The instability which produces these waves offers a potential mechanism to generate large amplitude long period waves in the ionosphere.

• Research Organization: Polytechnic Inst. of New York, Brooklyn, NY (United States). Dept. of Electrical Engineering and Computer Science
• OSTI ID: 5318811
• Report Number(s): AD-A-248332/9/XAB; CNN: AFOSR-88-0127
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED-PARTICLE PRECIPITATION
DIFFUSION
DIPOLES
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUID MECHANICS
HYDRODYNAMICS
HYDROMAGNETIC WAVES
INSTABILITY
INTERACTIONS
IONOSPHERE
MAGNETOHYDRODYNAMICS
MATHEMATICAL MODELS
MECHANICS
MULTIPOLES
NOISE
PLANETARY IONOSPHERES
PLASMA INSTABILITY
PLASMA WAVES
PROTON PRECIPITATION
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
RESEARCH PROGRAMS
SOLAR ACTIVITY
SOLAR WIND
WAVE PROPAGATION
WHISTLERS