Effects of Field-Aligned Cold Plasma Density Filaments on the Fine Structure of Chorus
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F22%3A00569492" target="_blank" >RIV/68378289:_____/22:00569492 - isvavai.cz</a>
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL101654" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL101654</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2022GL101654" target="_blank" >10.1029/2022GL101654</a>
Alternative languages
Result language
angličtina
Original language name
Effects of Field-Aligned Cold Plasma Density Filaments on the Fine Structure of Chorus
Original language description
The whistler-mode chorus emission, a major driver of radiation belt electron energization and precipitation, exhibits significant amplitude modulations on millisecond timescales. These subpacket modulations are accompanied by fast changes in the wave normal angle. Understanding the evolution of wave propagation properties inside chorus elements is essential for modeling nonlinear chorus-electron interactions, but the origin of these rapid changes is unclear. We propose that the variations come from propagation inside thin, field-aligned cold plasma enhancements (density ducts), which produce differing modulations in parallel and perpendicular wave magnetic field components. We show that a full-wave simulation on a filamented density background predicts wave vector and amplitude evolution similar to Van Allen Probes spacecraft observations. We further demonstrate that the commonly assumed wide density ducts, in which wave propagation can be studied with ray tracing methods, cannot explain the observed behavior. This indirectly proves the existence of wavelength-scale field-aligned density fluctuations.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geophysical Research Letters
ISSN
0094-8276
e-ISSN
1944-8007
Volume of the periodical
49
Issue of the periodical within the volume
24
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
e2022GL101654
UT code for WoS article
000924604600032
EID of the result in the Scopus database
2-s2.0-85145189230