Observations and theory of ion gyro-harmonic structures in the Stimulated Electromagnetic Emission (SEE) spectrum excited during second electron gyro-harmonic heating

Details Observations and theory of ion gyro-harmonic structures in the Stimulated Electromagnetic Emission (SEE) spectrum excited during second electron gyro-harmonic heating Observations and theory of ion gyro-harmonic structures in the Stimulated Electromagnetic Emission (SEE) spectrum excited during second electron gyro-harmonic heating

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa43a1877s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA43A-1877

Statistics

Computation

[2439] Ionosphere / Ionospheric Irregularities, [2447] Ionosphere / Modeling And Forecasting, [2471] Ionosphere / Plasma Waves And Instabilities

Scientific paper

Recent observations of Stimulated Electromagnetic Emission (SEE) during ionospheric heating near the second electron gyro-harmonic frequency at the HAARP facility, show structures ordered by harmonics of ion gyro-frequency. An analytical model is provided in which parametric decay of the pump wave into upper hybrid/electron Bernstein and neutralized ion Bernstein waves is considered. It is shown that for pump wave frequencies near the second electron gyro-harmonic, a band of upper hybrid/electron Bernstein waves separated by harmonics of the ion gyro-frequency is destabilized. Furthermore, a new 2D computational model using the Particle-In-Cell (PIC) method is developed to more thoroughly study nonlinear plasma processes involved in producing these spectral features. Results of the computational model are in acceptable agreement with the outcomes of simplified analytical model. According to the analytical and computational models, ion cyclotron structures in the SEE spectrum depend upon three parameters: 1) the pump field strength, 2) the pump field frequency offset relative to the second electron gyro-frequency and 3) angle of the pump field relative to the background magnetic field. In addition to the analytical and computational models, observational results of a set of experiments that are carried out in the HAARP facilities in the summer student research campaign (SSRC) 2011 to investigate effect of the above mentioned parameter regime on the cyclotron structures are provided and compared to the predictions of the analytical and computational models.

Affiliated with

Also associated with

No associations

Rating

Observations and theory of ion gyro-harmonic structures in the Stimulated Electromagnetic Emission (SEE) spectrum excited during second electron gyro-harmonic heating does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observations and theory of ion gyro-harmonic structures in the Stimulated Electromagnetic Emission (SEE) spectrum excited during second electron gyro-harmonic heating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations and theory of ion gyro-harmonic structures in the Stimulated Electromagnetic Emission (SEE) spectrum excited during second electron gyro-harmonic heating will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-875193