Počet záznamů: 1
Observations of the relationship between frequency sweep rates of chorus wave packets and plasma density
- 1.
SYSNO ASEP 0358096 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Observations of the relationship between frequency sweep rates of chorus wave packets and plasma density Tvůrce(i) Macúšová, Eva (UFA-U) RID
Santolík, Ondřej (UFA-U) RID, ORCID
Décréau, P. (FR)
Demekhov, A. G. (RU)
Nunn, D. (GB)
Gurnett, D. A. (US)
Pickett, J. S. (US)
Titova, E. E. (RU)
Kozelov, B. V. (RU)
Rauch, J. L. (FR)
Trotignon, J. G. (FR)Zdroj.dok. Journal of Geophysical Research - ISSN 0148-0227
Roč. 115, - (2010), A12257/1-A12257/8Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Observations ; chorus ; plasma density ; Wideband (WBD) ; Cluster Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP GAP205/10/2279 GA ČR - Grantová agentura ČR ME10001 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000285839900001 DOI 10.1029/2010JA015468 Anotace Chorus emissions are generated by a nonlinear mechanism involving wave-particle interactions with energetic electrons. Discrete chorus wave packets are narrowband tones usually rising (sometimes falling) in frequency. We investigate frequency sweep rates of chorus wave packets measured by the Wideband data (WBD) instrument onboard the Cluster spacecraft. In particular, we study the relationship between the sweep rates and the plasma density measured by the WHISPER active sounder. We have observed increasing values of the sweep rate for decreasing plasma densities. We have compared our results with results of simulations of triggered emissions as well as with estimates based on the backward wave oscillator model for chorus emissions. We demonstrate a reasonable agreement of our experimental results with theoretical ones. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2011
Počet záznamů: 1