A model of the subpacket structure of rising tone chorus emissions
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F20%3A00531477" target="_blank" >RIV/68378289:_____/20:00531477 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/00216208:11320/20:10414206
Výsledek na webu
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020JA028094" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020JA028094</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2020JA028094" target="_blank" >10.1029/2020JA028094</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
A model of the subpacket structure of rising tone chorus emissions
Popis výsledku v původním jazyce
The nonlinear growth theory of chorus emissions is used to develop a simple model of the subpacket formation. The model assumes that the resonant current, which is released from the source to the upstream region, radiates a new whistler mode wave with a slightly increased frequency, which triggers a new subpacket. Saturation of the growth in amplitude is controlled by the optimum amplitude. Numerical solution of advection equations for each subpacket, with the chorus equations acting as the boundary conditions, produces a chorus element with a subpacket structure. This element features an upstream shift of the source region with time and an irregular growth of frequency, showing small decreases between adjacent subpackets. The influence of input parameters on the number of subpackets, the shift of the source, the frequency sweep rate and the maximum amplitude is analyzed. The model well captures basic features of instantaneous frequency measurements provided by the Van Allen Probes spacecraft. The modeled wave field can be used in future particle acceleration studies.
Název v anglickém jazyce
A model of the subpacket structure of rising tone chorus emissions
Popis výsledku anglicky
The nonlinear growth theory of chorus emissions is used to develop a simple model of the subpacket formation. The model assumes that the resonant current, which is released from the source to the upstream region, radiates a new whistler mode wave with a slightly increased frequency, which triggers a new subpacket. Saturation of the growth in amplitude is controlled by the optimum amplitude. Numerical solution of advection equations for each subpacket, with the chorus equations acting as the boundary conditions, produces a chorus element with a subpacket structure. This element features an upstream shift of the source region with time and an irregular growth of frequency, showing small decreases between adjacent subpackets. The influence of input parameters on the number of subpackets, the shift of the source, the frequency sweep rate and the maximum amplitude is analyzed. The model well captures basic features of instantaneous frequency measurements provided by the Van Allen Probes spacecraft. The modeled wave field can be used in future particle acceleration studies.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10305 - Fluids and plasma physics (including surface physics)
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Geophysical Research: Space Physics
ISSN
2169-9380
e-ISSN
—
Svazek periodika
125
Číslo periodika v rámci svazku
8
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
17
Strana od-do
e2020JA028094
Kód UT WoS článku
000577125000047
EID výsledku v databázi Scopus
2-s2.0-85089900806