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A theory of the terrestrial kilometric radiation
C. S. Wu,Lou-Chuang Lee +1 more
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TLDR
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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Journal ArticleDOI
A new natural radio emission observed at South Pole Station
TL;DR: In this article, the authors analyzed the waveform data collected at South Pole Station in 2011-2012 within a few hours of magnetic midnight and revealed 12 observations of a new natural radio emission with frequencies ranging from 1320 to 2160 kHz.
Journal ArticleDOI
Relativistic electromagnetic ion cyclotron instabilities
TL;DR: The relativistic instabilities of electromagnetic ion cyclotron waves driven by MeV ions are analytically and numerically studied and interesting characteristics such as Alfve nic behavior and instability transition are discovered and illuminated in detail.
Journal ArticleDOI
Pulsations of auroral kilometric radiation at Pc1 frequencies
TL;DR: In this article, it was suggested that the parallel electric field of the earthward propagating wave can periodically produce the shell electron distribution, which could be the free energy source of the AKR pulse emission through the electron-cyclotron maser instability.
Journal Article
Control factor of solar cycle variation of auroral kilometric radiation
TL;DR: In this paper, the authors compared the variations of F+*.1 and solar wind dynamic pressure with upflowing ion (UFI) events and ambient plasma density, which are associated with generation conditions of AKR, and showed that the anticorrelation between discrete aurora and solar activities was not recognized through the studies on secular variations of auroral phenomena mainly based on old auroral records obtained in mid-latitude regions.
Wind/WAVES Observations of Auroral Kilometric Radiation: Automated Burst Detection and Terrestrial Solar Wind ‐ Magnetosphere Coupling Effects
Alexandra Ruth Fogg,Caitriona M. Jackman,James E. Waters,Xavier Bonnin,Laurent Lamy,Baptiste Cecconi,Karine Issautier,Corentin Louis +7 more
TL;DR: Auroral Kilometric radiation (AKR) is the strongest terrestrial radio emission, and emanates from the same electron acceleration regions from which particles precipitate into the ionosphere, exciting the aurorae and other phenomena as mentioned in this paper .
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