Ground-level detection of auroral kilometric radiation
نویسندگان
چکیده
منابع مشابه
3D 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 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 کاملA Coherent Nonlinear Theory of Auroral Kilometric Radiation, 1. Steady State Model
A theory of auroral kilometric radiation due to the nonlinear interaction between negative energy electromagnetic waves and coherent electrostatic ion cyclotron waves is developed. The theory predicts that such radiation produced must have X mode polarization and must have a frequency that lies in a narrow band between the right-hand cutoff and the Doppler-shifted beam cyclotron frequency for e...
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: Geophysical Research Letters
سال: 2011
ISSN: 0094-8276
DOI: 10.1029/2010gl046411