Accession Number:

AD0773650

Title:

Numerical Solutions for Long Unmodulated Whistler-Mode Signals in the Geomagnetosphere,

Descriptive Note:

Corporate Author:

STANFORD UNIV CALIF INST FOR PLASMA RESEARCH

Personal Author(s):

• Newman,C. E.

Report Date:

1973-12-20

Pagination or Media Count:

21.0

Abstract:

The author gives a method for solving the integral equation derived in a previous report, governing the temperal evolution of the amplitude of a key-down whistler-mode signal which interacts with counter-streaming gyroresonant electrons in a limited region of the geomagnetosphere. Then, for a set of values of plasma and wave parameters typical for observations at l 3, the author gives a family of solutions for a range of energetic electron densities. A certain critical density must be present in order for sustained quasi-periodic amplitude pulsations, similar to those reported in the literature, to occur. A second, and higher, critical density, above which the amplitude can actually undergo a change in sign is found this corresponds to a 180 degree phase shift in the signal. The behavior of these solutions is then discussed from both a mathematical and a physical point of view. Modified author abstract

Descriptors:

• *Whistlers
• *Magnetosphere
• Waves
• Particles
• Interactions
• Integral equations
• Wave functions
• Very low frequency

Subject Categories:

• Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE