Simulation study of the loss cone driven cyclotron maser applied to auroral kilometric radiation

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Radio Sci.; (United States)

DOI:https://doi.org/10.1029/RS019i002p00509· OSTI ID:6447662

Wagner, J S; Lee, L C; Wu, C S; Tajima, T

The linear growth and nonlinear saturation of electromagnetic radiation amplified by a hot (5-20 keV) population of electrons possessing a loss cone velocity distribution in the presence of a cold (20-500 eV) electron population are studied. A relativistic electromagnetic simulation code is used to study the emission process. Three cases are presented in detail to illustrate the generation process of auroral kilometric radiation. The first case, which has an electron plasma frequency omega(pe) 0.2 omega(ce) (electron cyclotron frequency) and possesses a double loss cone distribution, exhibits a strong narrow peak of the fast extraordinary mode (X mode) radiation just above the X mode cutoff frequency. The second case with omega(pe) 0.2 omega(ce) and a single loss cone distribution shows a preferred direction of propagation for the amplified radiation. The third case with omega(pe) 0.5 omega(ce) shows a peak in the ordinary mode (O mode) radiation. In all cases, the radiation saturates by turbulent scattering of resonant particles into the loss cone. 22 references.

• Research Organization: Sandia National Lab., Albuquerque, NM
• DOE Contract Number: AT06-76ER70005; FG05-80ET53088
• OSTI ID: 6447662
• Journal Information: Radio Sci.; (United States), Journal Name: Radio Sci.; (United States) Vol. 19; ISSN RASCA
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
AURORAE
COMPUTERIZED SIMULATION
CYCLOTRON FREQUENCY
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELECTRONS
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
LEPTONS
LONG WAVE RADIATION
LOSS CONE
MAGNETIC STORMS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
RADIATIONS
RADIOWAVE RADIATION
SIMULATION