We have studied the parametric interaction between a fast magnetosonic (FM) mode and a lower oblique resonance (LOR) mode in a cold, magnetized plasma using a kinetic, three dimensional Particle-in-Cell simulation code called the Large Scale Plasma. The FM mode is excited with a loop antenna driven at a frequency below the lower hybrid frequency (ωLH), while the LOR is excited at a frequency above ωLH. For historical purposes explained in the Introduction, we call the antennas which drive the FM mode and LOR mode Extremely Low Frequency (ELF) and Very Low Frequency (VLF) antennas, respectively. The antennas are modeled as magnetic dipoles (ρant = 0) and are assigned a time varying current density within a finite sized current loop. The VLF and ELF antennas are driven at 10 A and 3 A, respectively. The parametric interaction is excited with a combined ELF/VLF antenna (which we call a parametric antenna) and includes both antennas driven simultaneously in the same simulation domain. We show that the parametric antenna non-linearly excites electromagnetic (EM) whistler waves to a greater extent than the VLF antenna alone. We also show that the parametric excitation of EM whistler waves leads to greater emitted EM power (measured in Watts) compared with a VLF antenna alone.
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June 2018
Research Article|
June 28 2018
Excitation of electromagnetic whistler waves due to a parametric interaction between magnetosonic and lower oblique resonance modes in a cold, magnetized plasma
D. Main;
V. Sotnikov;
V. Sotnikov
2
Air Force Research Laboratory (AFRL/RY)
, Wright Patterson AFB, Ohio 45433, USA
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J. Caplinger
;
J. Caplinger
2
Air Force Research Laboratory (AFRL/RY)
, Wright Patterson AFB, Ohio 45433, USA
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D. V. Rose
D. V. Rose
3
Voss Scientific
, Albuquerque, New Mexico 87108, USA
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Phys. Plasmas 25, 062310 (2018)
Article history
Received:
December 14 2017
Accepted:
June 07 2018
Citation
D. Main, V. Sotnikov, J. Caplinger, D. V. Rose; Excitation of electromagnetic whistler waves due to a parametric interaction between magnetosonic and lower oblique resonance modes in a cold, magnetized plasma. Phys. Plasmas 1 June 2018; 25 (6): 062310. https://doi.org/10.1063/1.5019589
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