Nonlinear mechanisms of lower-band and upper-band VLF chorus emissions in the magnetosphere

• Published in: Journal of Geophysical Research: Space Physics Vol. 114; no. A7
• Main Authors: Omura, Yoshiharu, Hikishima, Mitsuru, Katoh, Yuto, Summers, Danny, Yagitani, Satoshi
• Format: Journal Article
• Language: English
• Published: Washington, DC Blackwell Publishing Ltd 01.07.2009; American Geophysical Union
• Subjects: chorus; Earth sciences; Earth, ocean, space; Exact sciences and technology; nonlinear; whistler mode; magnetic field; Field line; growth rates; Differential equation; Plasma density; electrons; Whistler wave; amplitude; magnetosphere; propagation; Non linear damping; Particle code; Wave packet; inhomogeneity; growth; Dawn chorus; electron density; dispersion; Gyrofrequency; theory; Non linear wave

We develop a nonlinear wave growth theory of magnetospheric chorus emissions, taking into account the spatial inhomogeneity of the static magnetic field and the plasma density variation along the magnetic field line. We derive theoretical expressions for the nonlinear growth rate and the amplitude t...