Wave magnetic field amplitude threshold for nonlinear trapping of energetic gyroresonant and Landau resonant electrons by nonducted VLF waves in the magnetosphere

Journal Article · Tue Apr 01 04:00:00 EST 1986 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA091iA04p04365· OSTI ID:5716074

Bell, T F

Using a recently developed theory, we calculate the wave magnetic field amplitude threshold B/sub tau/ necessary to allow the nonlinear trapping of energetic gyroresonant and Landau resonant electrons by VLF whistler mode waves in the magnetosphere, propagating at an arbitrary angle, psi, with respect to the earth's magnetic field, B/sub 0/. This theory predicts that the amplitude threshold is governed near the magnetic equatorial plane by the gradient of psi with respect to distance, z, along B/sub 0/. Using commonly accepted models of the magnetosphere and computer raytracing techniques, we determine the function psi(z) for magnetic shells in the range 2< or =L< or =5 and for frequencies 5 kHz< or =f< or =17.8 kHz.

• Research Organization: Space, Telecommunications, Radioscience Laboratory, Stanford University, California
• OSTI ID: 5716074
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 91:A4; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY LEVELS
FERMIONS
GYROFREQUENCY
LEPTONS
MAGNETIC FIELDS
MAGNETIC RESONANCE
NOISE
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
RESONANCE
TRAPPED ELECTRONS
WAVE PROPAGATION
WHISTLERS