Properties of the magnetospheric backward wave oscillator inferred from CLUSTER measurements of VLF chorus elements

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F12%3A00380721" target="_blank" >RIV/68378289:_____/12:00380721 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1029/2012JA017713" target="_blank" >http://dx.doi.org/10.1029/2012JA017713</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2012JA017713" target="_blank" >10.1029/2012JA017713</a>

Result language
angličtina
Original language name
Properties of the magnetospheric backward wave oscillator inferred from CLUSTER measurements of VLF chorus elements
Original language description
According to the backward wave oscillator (BWO) model, a sharp gradient (or step-like deformation) on the electron distribution function is the most important factor in chorus generation, but such a feature is very difficult to observe directly. The properties of the step in the BWO model determine the dimensionless parameter q quantifying the excess of the energetic electron flux above the absolute-instability threshold. This parameter, in turn, is related to the frequency sweep rate of chorus elements, which we obtained by using data from the WBD instrument onboard the CLUSTER satellites in the equatorial region for more than 7000 chorus elements. Then, using the CLUSTER data for the plasma density and magnetic field, we calculated q assuming the validity of the BWO theory and found that the q values depend only weakly on the density; the average values of q 7 for the lower band chorus (f/fce < 0.5) and q 13 for the upper band (f/fce > 0.5). These q values constitute a large excess o
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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