Simulations of ionospheric turbulence produced by HF heating near the upper hybrid layer
Abstract
Heating of the ionosphere by high‐frequency (HF), ordinary (O) mode electromagnetic waves can excite magnetic field‐aligned density striations, associated with upper and lower hybrid turbulence and electron heating. We have used Vlasov simulations in one spatial and two velocity dimensions to study the induced turbulence in the presence of striations when the O‐mode pump is mode converted to large‐amplitude upper hybrid oscillations trapped in a striation. Parametric processes give rise to upper and lower hybrid turbulence, as well as to large amplitude, short wavelength electron Bernstein waves. The latter excite stochastic electron heating when their amplitudes exceed a threshold for stochasticity, leading to a rapid increase of the electron temperature by several thousands of kelvin. The results have relevance for high‐latitude heating experiments.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 01, 2016
- Source ID
- 10.1002/2015rs005866
Entities
People
- A. Najmi
- B. Eliasson
- G. M. Milikh
- K. Papadopoulos
- Xuan‐Min Shao
Organizations
- Defense Advanced Research Projects Agency
- Engineering and Physical Sciences Research Council
- Johns Hopkins University
- University of Maryland
- University of Strathclyde