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A theory of the terrestrial kilometric radiation
C. S. Wu,Lou-Chuang Lee +1 more
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In this paper, it was found that reflected electrons can result in the amplification of electromagnetic waves via a relativistic normal cyclotron resonance, which may explain the recently discovered terrestrial kilometric radiation.Abstract:
During magnetospheric substorms, electrons with energies of about 1 keV are injected from the plasma-sheet region into the auroral region. A fraction of these energetic electrons can precipitate into the upper atmosphere, and the rest are reflected because of the mirror effect of the convergent geomagnetic field. It is found that these reflected electrons can result in the amplification of electromagnetic waves via a relativistic normal cyclotron resonance. This process may explain the recently discovered terrestrial kilometric radiation.read more
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Ordinary mode auroral kilometric radiation, with harmonics, observed by ISIS 1
TL;DR: In this article, the propagation modes of o-mode auroral kilometric radiation (AKR) were identified by comparing the natural radiation wave cutoffs with the local resonant and wave cutoff phenomena stimulated by the sounder transmitter.
Journal ArticleDOI
Effects of Fully Relativistic Condition on Electron Cyclotron Maser Emission
TL;DR: In this paper , the authors investigated the electron cyclotron maser instability driven by a power-law electron distribution with a low-energy cutoff and showed that both in the semirelativistic and fully relativistic cases, the growth rate and relative frequency bandwidth of ordinary (O) and extraordinary (X) modes show a positive correlation with cutoff energy.
Journal ArticleDOI
Rotational Modulation of the High Frequency Limit of Saturn Kilometric Radiation
Siyuan Wu,Philippe Zarka,Laurent Lamy,Corentin Louis,Shengyi Ye,Renée Prangé,Baptiste Cecconi,William S. Kurth +7 more
TL;DR: In this paper , the authors determined and analyzed the high frequency limit (HFL) of the Saturnian Kilometric Radiation (SKR) throughout the entire Cassini Saturn orbital tour, showing that the maximum frequency of the northern SKR, whose distribution peaks at ∼625 kHz, is shifted by +100 to +200 kHz from the distribution of southern SKR HFL, consistent with the magnetic field offset toward the northern hemisphere at Saturn.
Validation of LAIC model within the framework of ISSI project "Multi-instrument space-borne observations and validation of the physical model of the Lithosphere-Atmosphere-Ionosphere-Magnetosphere Coupling"
TL;DR: In this article, a new international project to study the complex chain of interactions of different layers of atmosphere and near-Earth space plasma in presence of ionization sources and atmosphere loading by aerosol and dust, was initiated with the support of the International Space Science Institute (ISSI) in Bern.
Journal ArticleDOI
3D PiC code investigations of auroral kilometric radiation mechanisms
Karen Gillespie,Sandra McConville,David Speirs,Kevin Ronald,Alan D. R. Phelps,Robert Bingham,Adrian W. Cross,Craig Robertson,Colin G. Whyte,Wenlong He,I. Vorgul,R. A. Cairns,B. J. Kellett +12 more
TL;DR: In this article, 3D PiC code simulations were conducted to enable complete investigation of the complex interaction dimensions of AKR and a maximum efficiency of 1.25% was predicted from these simulations in the same mode and frequency as measured in the experiment.
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