Incidence angle dependence of Langmuir turbulence and artificial ionospheric layers driven by high-power HF-heating

Eliasson, Bengt; Milikh, G. M.; Shao, Xi; Mishin, E. V.; Papadopoulos, K.

doi:10.1017/s0022377814000968

Cited by 15 publications

(16 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The power spectral indices decrease with time. The spectra indices of the saturated FAIs (−3.0 ± 0.4 in parallel incidence and −3.4 ± 0.4 in perpendicular incidence) are consistent with Farley et al (1983).…”

Section: Discussionsupporting

confidence: 65%

“…Gondarenko et al (2006) compare the power spectral density of electron density at high latitude in three different directions of the heater beam, vertical, 6 and 12 • (field-aligned) between the wave propagation direction and the vertical, and show that the power spectral indices are −4, −3 and −1.6, respectively. Farley et al (1983) analyze the satellite data from the eastern portions of the path through the heater beam in an ionospheric heating experiment at Arecibo and find that the power spectral index is −3.3. Our simulation presents the spatial power spectral indices at different times.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical simulation of oblique ionospheric heating by powerful radio waves

et al. 2018

View full text Add to dashboard Cite

In this paper, we investigate the ionospheric heating by oblique incidence of powerful high-frequency (HF) radio waves using three-dimensional numerical simulations. The ionospheric electron density and temperature perturbations are examined by incorporating the ionospheric electron transport equations and ray-tracing algorithm. The energy distribution of oblique incidence heating waves in the ionosphere is calculated by the three-dimensional ray-tracing algorithm. The calculation takes into consideration the electric field of heating waves in the caustic region by the plane wave spectral integral method. The simulation results show that the ionospheric electron density and temperature can be disturbed by oblique incidence of powerful radio waves, especially in the caustic region of heating waves. The oblique ionospheric heating with wave incidence parallel and perpendicular to the geomagnetic field in the mid-latitude ionosphere is explored by simulations, results of which indicate that the ionospheric modulation is more effective when the heating wave propagates along the magnetic field line. Ionospheric density and temperature striations in the caustic region due to thermal self-focusing instability are demonstrated, as well as the time evolution of the corresponding fluctuation spectra.

show abstract

Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Numerical simulation of oblique ionospheric heating by powerful radio waves

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Further details of the processes mentioned above and the thermodynamics involved are presented in [11], i.e., the ionospheric layers driven by high-power high-frequency (HF) heating. Strong Langmuir turbulence created by the HAARP transmitter leads to the acceleration of 10-20-eV electrons that ionize the neutral gas, thereby creating artificial ionospheric layers.…”

Section: Discussionmentioning

confidence: 99%

Simulation of Nikola Tesla Atmospheric (Maser) Discharges

Kekez

2015

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

In this paper, an attempt is made in the laboratory to simulate Nikola Tesla atmospheric maser discharges. The ground lightning bolt, commonly observed, takes the form of filamentary lightning channels called the leader and the return strokes. It is taken that Nikola Tesla atmospheric discharges are obtained when a powerful high-frequency source triggers the atmospheric discharge and enables the energy stored in the cumulonimbus clouds to be released in the form of maser radiations, which are accompanied by a diffuse glow-like discharge covering a large area, as in the case of the aurora borealis. The main point in the current investigation is the generation of the powerful hydrogen atom (maser) line at 1.420 GHz recorded under the condition of high humidity present in air. This suggests that the driving frequency of high power at a frequency close to 1 GHz is capable of electrolysis of the water vapor present in air, dissociation of the hydrogen molecule into atoms, excitation of atomic hydrogen, and consequent emission from the hydrogen atoms in the manner found in the hydrogen atomic clock.Index Terms-Coherence effect, gliding (spark channel) discharges and aurora borealis, maser generation.

show abstract

“…It seems relevant to briefly discuss the SLT acceleration of suprathermal electrons producing artificial aurora and ionization in active space experiments with high-power radio waves (Mishin and Pedersen, 2011;Eliasson et al, 2012Eliasson et al, , 2015Mishin et al, 2016). Here Langmuir waves are parametrically driven by ordinary (O) pump waves near the reflection altitude, h 0 , where the pump frequency, f o , matches the local plasma frequency, f pe (h 0 ) (the interested reader is referred to Streltsov et al, 2018 review).…”

Section: Slt Acceleration In High-power Radio Wave Experimentsmentioning

confidence: 99%

Artificial Aurora Experiments and Application to Natural Aurora

Mishin

2019

Front. Astron. Space Sci.

View full text Add to dashboard Cite

A review is given of the effects observed during injections of powerful electron beams from sounding rockets into the upper atmosphere. Data come from in situ particle and wave measurements near a beam-emitting rocket and ground-based optical, wideband radiowave, and radar observations. The overall data cannot be explained solely by collisional degradation of energetic electrons but require collisionless beam-plasma interactions (BPI) be taken into account. The beam-plasma discharge theory describes the features of the region near a beam-emitting rocket, where the beam-excited plasma waves energize plasma electrons, which then ignite the discharge. The observations far beneath the rocket reveal a double-peak structure of artificial auroral rays, which can be understood in terms of the beam-excited strong Langmuir turbulence being affected by collisions of ionospheric electrons. This leads to the enhanced energization of ionospheric electrons in a narrow layer termed the plasma turbulence layer (PTL), which explains the upper peak. Similar double-peak structures or a sharp upper boundary in rayed auroral arcs have been observed in the auroral ionosphere by optical, radar, and rocket observations, and called Enhanced Aurora. A striking resemblance between Enhanced and Artificial Aurora altitude profiles indicates that they are created by the above BPI process which results in the PTL.

show abstract

Incidence angle dependence of Langmuir turbulence and artificial ionospheric layers driven by high-power HF-heating

Cited by 15 publications

References 15 publications

Numerical simulation of oblique ionospheric heating by powerful radio waves

Numerical simulation of oblique ionospheric heating by powerful radio waves

Simulation of Nikola Tesla Atmospheric (Maser) Discharges

Artificial Aurora Experiments and Application to Natural Aurora

Contact Info

Product

Resources

About