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Computer simulation of auroral kilometric radiation
Author(s) -
Wagner J. S.,
Lee L. C.,
Wu C. S.,
Tajima T.
Publication year - 1983
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl010i006p00483
Subject(s) - physics , maser , radiation , cyclotron , instability , population , scattering , computational physics , electron , electromagnetic radiation , cyclotron radiation , relativistic particle , atomic physics , astrophysics , optics , nuclear physics , mechanics , demography , sociology
We study the generation of auroral kilometric radiation (AKR) using relativistic, electromagnetic, particle simulations. The AKR source region is modeled by two electron populations in the simulation: a cold (200ev) Maxwellian component and a hot (5‐20kev) population possessing a loss‐cone feature. The loss‐cone distribution is found to be unstable to the cyclotron maser instability. The fast extraordinary (X‐mode) waves dominate the radiation and saturate when resonant particles diffuse into the loss‐cone via turbulent scattering of the particles by the amplified X‐mode radiation.