Generation of whistler waves by continuous HF heating of the upper ionosphere

A. Vartanyan; G. M. Milikh; B. Eliasson; A. C. Najmi; Michel Parrot; K. Papadopoulos

Generation of whistler waves by continuous HF heating of the upper ionosphere

A. Vartanyan ¹ G. M. Milikh ² B. Eliasson ² A. C. Najmi ¹ Michel Parrot ³ K. Papadopoulos ²

1 APL - Johns Hopkins University Applied Physics Laboratory [Laurel, MD]

2 Department of Physics and Department of Astronomy

3 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace

Abstract : Broadband VLF waves in the frequency range 7–10 kkHz and 15–19 kHz, generated by F region CW HF ionospheric heating in the absence of electrojet currents, were detected by the DEMETER satellite overflying the High Frequency Active Auroral Research Program (HAARP) transmitter during HAARP/BRIOCHE campaigns. The VLF waves are in a frequency range corresponding to the F region lower lybrid (LH) frequency and its harmonic. This paper aims to show that the VLF observations are whistler waves generated by mode conversion of LH waves that were parametrically excited by HF-pump-plasma interaction at the upper hybrid layer. The paper discusses the basic physics and presents a model that conjectures (1) the VLF waves observed at the LH frequency are due to the interaction of the LH waves with meter-scale field-aligned striations—generating whistler waves near the LH frequency; and (2) the VLF waves at twice the LH frequency are due to the interaction of two counterpropagating LH waves—generating whistler waves near the LH frequency harmonic. The model is supported by numerical simulations that show good agreement with the observations. The (Detection of Electromagnetic Emissions Transmitted from Earthquake Regions results and model discussions are complemented by the Kodiak radar, ionograms, and stimulated electromagnetic emission observations.

Document type :

Journal articles

Domain :

Sciences of the Universe [physics]

Complete list of metadatas

Cited literature [31 references] Display Hide Download

https://hal-insu.archives-ouvertes.fr/insu-01372250
Contributor : Nathalie Rouchon <>
Submitted on : Monday, May 29, 2017 - 2:35:25 PM
Last modification on : Friday, August 2, 2019 - 2:30:10 PM
Long-term archiving on : Wednesday, September 6, 2017 - 11:15:53 AM

Vartanyan_et_al-2016-Radio_Sci...

Publisher files allowed on an open archive

Generation of whistler waves by continuous HF heating of the upper ionosphere

File

Identifiers

Collections

Citation

Export

Metrics

133

180

Contact

Generation of whistler waves by continuous HF heating of the upper ionosphere

File

Identifiers

Collections

Citation

Export

Share

Metrics

133

180

Contact