Origin of auroral kilometric radiation as conversion of the upper hybrid mode plasma waves.
نویسندگان
چکیده
منابع مشابه
A 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 کاملGeneration 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 کاملStriated drifting auroral kilometric radiation bursts: Possible stimulation by upward traveling EMIC waves
[1] We investigate waves observed by the Cluster wideband instrument (WBD) during an orbital conjunction with the Polar spacecraft. During this perigee pass, Polar was at the upper extent of the auroral kilometric radiation (AKR) source region in the Southern Hemisphere nightside auroral region. Cluster was located at higher altitude above this region and observed AKR with clear signatures of o...
متن کاملScaled Experiment to Investigate Auroral Kilometric Radiation Mechanisms in the Presence of Background Electrons
Auroral Kilometric Radiation (AKR) emissions occur at frequencies ~300kHz polarised in the X-mode with efficiencies ~1-2% [1,2] in the auroral density cavity in the polar regions of the Earth’s magnetosphere, a region of low density plasma ~3200km above the Earth’s surface, where electrons are accelerated down towards the Earth whilst undergoing magnetic compression. As a result of this magneti...
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ژورنال
عنوان ژورنال: Proceedings of the Japan Academy, Series B
سال: 1990
ISSN: 0386-2208,1349-2896
DOI: 10.2183/pjab.66.129