Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 704-717 |
| Number of pages | 13 |
| Journal | Radio Science |
| Volume | 51 |
| Issue number | 6 |
| Early online date | 29 May 2016 |
| DOIs | |
| Publication status | Published - 22 Jun 2016 |
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Keywords
- ionospheric turbulence
- upper hybrid waves
- stochastic heating
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Simulations of ionospheric turbulence produced by HF heating near the upper hybrid layer. / Najmi, A.; Eliasson, B.; Shao, X.; Milikh, G.; Papadopoulos, K.
In: Radio Science, Vol. 51, No. 6, 22.06.2016, p. 704-717.Research output: Contribution to journal › Article
TY - JOUR
T1 - Simulations of ionospheric turbulence produced by HF heating near the upper hybrid layer
AU - Najmi, A.
AU - Eliasson, B.
AU - Shao, X.
AU - Milikh, G.
AU - Papadopoulos, K.
PY - 2016/6/22
Y1 - 2016/6/22
N2 - Heating of the ionosphere by high-frequency (HF), ordinary (O) mode electromagnetic waves can excite magnetic field aligned density striations (FAS), 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.
AB - Heating of the ionosphere by high-frequency (HF), ordinary (O) mode electromagnetic waves can excite magnetic field aligned density striations (FAS), 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.
KW - ionospheric turbulence
KW - upper hybrid waves
KW - stochastic heating
UR - http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/(ISSN)1944-799X/
U2 - 10.1002/2015RS005866
DO - 10.1002/2015RS005866
M3 - Article
VL - 51
SP - 704
EP - 717
JO - Radio Science
JF - Radio Science
SN - 0048-6604
IS - 6
ER -