Generation and propagation of cyclotron maser emissions in the finite auroral kilometric radiation source cavity
نویسندگان
چکیده
منابع مشابه
Generation of Auroral Kilometric Radiation in Bounded Source Regions
Owing to the complete and precise wave/particle measurements performed by the Viking and FAST spacecraft in the sources of the terrestrial Auroral Kilometric Radiation, the conditions of generation of this coherent radio emission are now well documented. It has been demonstrated that the production of radio waves occurs in thin laminar regions that exactly correspond to the regions of auroral p...
متن کاملBackward wave cyclotron-maser emission in the auroral magnetosphere.
In this Letter, we present theory and particle-in-cell simulations describing cyclotron radio emission from Earth's auroral region and similar phenomena in other astrophysical environments. In particular, we find that the radiation, generated by a down-going electron horseshoe distribution is due to a backward-wave cyclotron-maser emission process. The backward wave nature of the radiation cont...
متن کاملA simple model of the Auroral Kilometric Radiation visibility
Data collected with Polrad swept frequency analyzer during almost 2.5 years of Interball-2 mission are used to investigate the directivity properties of AKR observed in the Northern Hemisphere. In contrast with the previous, mostly statistical studies, single dynamic spectra have been analyzed. Simple modeling of AKR source visibility from the location of the observer makes possible to find app...
متن کامل3D PiC code investigations of Auroral Kilometric Radiation mechanisms
Efficient (~1%) electron cyclotron radio emissions are known to originate in the X mode from regions of locally depleted plasma in the Earths polar magnetosphere. These emissions are commonly referred to as the Auroral Kilometric Radiation (AKR). AKR occurs naturally in these polar regions where electrons are accelerated by electric fields into the increasing planetary magnetic dipole. Here con...
متن کاملPositron-Cyclotron Maser for the Core Emissions from Pulsars
We use the cyclotron-maser theory to explain the core emission from the magnetosphere of pulsars. As a kind of direct and efficient maser type of emission, it can give rise to escaping radiation with extremely high brightness temperature and narrow angle with respect to the magnetic axis. We find that the growth rates and real frequencies of the O-mode electromagnetic wave propagating parallel ...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2002
ISSN: 0148-0227
DOI: 10.1029/2002ja009403