volume | PIER Journals

Abstract

This study explores the variability in the electric field, plasma number density, and plasma velocity driven by high-frequency (HF) radio wave injected into the vertically stratified ionosphere at a millisecond time scale after switch-on of the radio transmitter. It was found that the modeconversion process of electromagnetic (EM) waves took place at the reflection heights of both the R-X (right-circularly polarized extraordinary wave, R-X) and L-O (left-circularly polarized ordinary wave, L-O) modes. The ionospheric electron number density was remarkably oscillatory. A depletion of ionospheric ion number density at the L-O mode turning point and two ion number density peaks on each side of the O-mode reflection region were discovered. The turbulent layer of the ion density peak at the bottom of the critical height shifted downwards, which qualitatively conforms to the observations made at the Areciboand the EISCAT. The vertical electron velocity oscillated near the L-O mode reflection point. The vertical ion velocity remained positive above the reflection height of the L-O mode and remained negative below this height. These results, which were derived using realistic length scales, ion masses, pump waves, and other plasma parameters, are consistent with theoretical predictions and prior experimental observations, and should thus be useful for understanding the linear and nonlinear interactions between the HF EM wave and the ionospheric plasma at the initial stage.

1. Kelley, M. C., The Earth's Ionosphere: Plasma Physics and Electrodynamics, Vol. 96, Academic Press, 2009.

2. Bernhardt, P., W. A. Scales, S. Grach, A. Keroshtin, D. Kotik, and S. Polyakov, "Excitation of artificial airglow by high power radio waves from the "Sura" ionospheric heating facility," Geophys. Res. Lett., Vol. 18, 1477-1480, 1991.
doi:10.1029/91GL01847

3. Carroll, J., E. Violette, and W. Utlaut, "The Platteville high power facility," Radio Sci., Vol. 9, 889-894, 1974.
doi:10.1029/RS009i011p00889

4. Kuo, S. and A. Snyder, "Artificial plasma cusp generated by upper hybrid instabilities in HF heating experiments at HAARP," J. Geophys. Res. --- Space Phys., Vol. 118, 2734-2743, 2013.
doi:10.1002/jgra.50276

5. Robinson, T., F. Honary, A. Stocker, T. Jones, and P. Stubbe, "First EISCAT observations of the modification of F-region electron temperatures during RF heating at harmonics of the electron gyro frequency," Journal of Atmospheric and Terrestrial Physics, Vol. 58, 385-395, 1996.
doi:10.1016/0021-9169(95)00043-7

6. Wu, J., J. Wu, and Z. Xu, "Results of ionospheric heating experiments involving an enhancement in electron density in the high latitude ionosphere," Plasma Sci. Technol., Vol. 18, 890, 2016.
doi:10.1088/1009-0630/18/9/03

7. Blagoveshchenskaya, N., T. Borisova, V. Kornienko, V. Frolov, M. Rietveld, and A. Brekke, "Some distinctive features in the behavior of small-scale arti¯cial ionospheric irregularities at mid-and high latitudes," Radiophys. Quantum Electron., Vol. 50, 619-632, 2007.
doi:10.1007/s11141-007-0054-4

8. Pedersen, T., M. McCarrick, B. Reinisch, B. Watkins, R. Hamel, and V. Paznukhov, "Production of artificial ionospheric layers by frequency sweeping near the 2nd gyroharmonic," Ann. Geophys., Vol. 29, 2011.
doi:10.5194/angeo-29-47-2011

9. Kosch, M., T. Pedersen, M. Rietveld, B. Gustavsson, S. Grach, and T. Hagfors, "Artificial optical emissions in the high-latitude thermosphere induced by powerful radio waves: An observational review," Adv. Space Res., Vol. 40, 365-376, 2007.
doi:10.1016/j.asr.2007.02.061

10. Leyser, T., "Stimulated electromagnetic emissions by high-frequency electromagnetic pumping of the ionospheric plasma," Space Sci. Rev., Vol. 98, 223-328, 2001.
doi:10.1023/A:1013875603938

11. Thide, B., H. Kopka, and P. Stubbe, "Observations of stimulated scattering of a strong high-frequency radio wave in the ionosphere," Phys. Rev. Lett., Vol. 49, 1561, 1982.
doi:10.1103/PhysRevLett.49.1561

12. Stubbe, P., H. Kohl, and M. Rietveld, "Langmuir turbulence and ionospheric modification," J. Geophys. Res. --- Space Phys., Vol. 97, 6285-6297, 1992.
doi:10.1029/91JA03047

13. Gurevich, A. V., "Nonlinear effects in the ionosphere," Phys. Usp., Vol. 50, 1091-1121, 2007.
doi:10.1070/PU2007v050n11ABEH006212

14. Huang, J. and S. Kuo, "Cyclotron harmonic effect on the thermal oscillating two-stream instability in the high latitude ionosphere," J. Geophys. Res. --- Space Phys., Vol. 99, 2173-2181, 1994.
doi:10.1029/93JA02668

15. Kuo, S., M. Lee, and P. Kossey, "Excitation of oscillating two stream instability by upper hybrid pump waves in ionospheric heating experiments at Tromso," Geophys. Res. Lett., Vol. 24, 2969-2972, 1997.
doi:10.1029/97GL03054

16. Robinson, T., A. Stocker, G. Bond, P. Eglitis, D.Wright, T. Jones, et al. "First CUTLASS-EISCAT heating results," Adv. Space Res., Vol. 21, 663-666, 1998.
doi:10.1016/S0273-1177(97)01000-4

17. Djuth, F., P. Stubbe, M. Sulzer, H. Kohl, M. Rietveld, and J. Elder, "Altitude characteristics of plasma turbulence excited with the Tromso superheater," J. Geophys. Res. --- Space Phys., Vol. 99, 333-339, 1994.
doi:10.1029/93JA02289

18. Wong, A., J. Santoru, and G. Sivjee, "Active stimulation of the auroral plasma," J. Geophys. Res. --- Space Phys., Vol. 86, 7718-7732, 1981.
doi:10.1029/JA086iA09p07718

19. Robinson, T., "The heating of the high lattitude ionosphere by high power radio waves," Physics Reports, Vol. 179, 79-209, 1989.
doi:10.1016/0370-1573(89)90005-7

20. DuBois, D. F., H. A. Rose, and D. Russell, "Excitation of strong Langmuir turbulence in plasmas near critical density: Application to HF heating of the ionosphere," J. Geophys. Res. --- Space Phys., Vol. 95, 21221-21272, 1990.
doi:10.1029/JA095iA12p21221

21. Frolov, V., L. Erukhimov, S. Metelev, and E. Sergeev, "Temporal behaviour of artificial small-scale ionospheric irregularities: Review of experimental results," J. Atmos. Sol.-Terr. Phys., Vol. 59, 2317-2333, 1997.
doi:10.1016/S1364-6826(96)00126-5

22. Wong, A., T. Tanikawa, and A. Kuthi, "Observation of ionospheric cavitons," Physical Review Letters, Vol. 58, 1375, 1987.
doi:10.1103/PhysRevLett.58.1375

23. Vas' kov, V. and N. Ryabova, "Parametric excitation of high frequency plasma oscillations in the ionosphere by a powerful extraordinary radio wave," Adv. Space Res., Vol. 21, 697-700, 1998.
doi:10.1016/S0273-1177(97)01006-5

24. Pandey, R. S. and D. Singh, "Study of electromagnetic ion-cyclotron instability in a magnetoplasma," Progress In Electromagnetics Research, Vol. 14, 147-161, 2010.
doi:10.2528/PIERM10052501

25. Xiang, W., Z. Chen, M. Liu, F. Honary, B. Ni, and Z. Zhao, "Threshold of parametric instability in the ionospheric heating experiments," Plasma Sci. Technol., Vol. 20, 115301, 2018.
doi:10.1088/2058-6272/aac71d

26. Duncan, L. and J. Sheerin, "High-resolution studies of the HF ionospheric modification interaction region," J. Geophys. Res. --- Space Phys., Vol. 90, 8371-8376, 1985.
doi:10.1029/JA090iA09p08371

27. Eliasson, B. and L. Stenflo, "Full-scale simulation study of stimulated electromagnetic emissions: The first ten milliseconds," J. Plasma Phys., Vol. 76, 369-375, 2010.
doi:10.1017/S0022377809990559

28. Djuth, F., B. Isham, M. Rietveld, T. Hagfors, and C. La Hoz, "First 100 ms of HF modification at Tromso, Norway," J. Geophys. Res. --- Space Phys., Vol. 109, 2004.
doi:10.1029/2003JA010236

29. Isham, B., W. Birkmayer, T. Hagfors, and W. Kofman, "Observations of small-scale plasma density depletions in Arecibo HF heating experiments," J. Geophys. Res. --- Space Phys., Vol. 92, 4629-4637, 1987.
doi:10.1029/JA092iA05p04629

30. Cros, B., J. Godiot, G. Matthieussent, and A. Heron, "Laboratory simulation of ionospheric heating experiment," Geophys. Res. Lett., Vol. 18, 1623-1626, 1991.
doi:10.1029/91GL01376

31. Eliasson, B., X. Shao, G. Milikh, E. V. Mishin, and K. Papadopoulos, "Numerical modeling of artificial ionospheric layers driven by high-power HF heating," J. Geophys. Res. --- Space Phys., Vol. 117, 2012.

32. Goodman, S., H. Usui, and H. Matsumoto, "Particle-in-cell (PIC) simulations of electromagnetic emissions from plasma turbulence," Phys. Plasmas, Vol. 1, 1765-1767, 1994.
doi:10.1063/1.870680

33. Yee, K., "Numerical solution of initial boundary value problems involving Maxwell's equations in isotropic media," IEEE Trans. Antennas Propag., Vol. 14, 302-307, 1966.
doi:10.1109/TAP.1966.1138693

34. Simpson, J. J., "On the possibility of high-level transient coronal mass ejection --- induced ionospheric current coupling to electric power grids," J. Geophys. Res. --- Space Phys., Vol. 116, 2011.

35. Cummer, S. A., "An analysis of new and existing FDTD methods for isotropic cold plasma and a method for improving their accuracy," IEEE Trans. Antennas Propag., Vol. 45, 392-400, 1997.
doi:10.1109/8.558654

36. Wang, M.-Y., J. Xu, J. Wu, B. Wei, H.-L. Li, T. Xu, and D.-B. Ge, "FDTD study on wave propagation in layered structures with biaxial anisotropic metamaterials," Progress In Electromagnetics Research, Vol. 81, 253-265, 2008.
doi:10.2528/PIER07122602

37. Simpson, J. J. and A. Taflove, "A review of progress in FDTD Maxwell's equations modeling of impulsive subionospheric propagation below 300 kHz," IEEE Trans. Antennas Propag., Vol. 55, 1582-1590, 2007.
doi:10.1109/TAP.2007.897138

38. Young, J., "A full finite difference time domain implementation for radio wave propagation in a plasma," Radio Sci., Vol. 29, 1513-1522, 1994.
doi:10.1029/94RS01921

39. Yu, Y. and J. J. Simpson, "An EJ collocated 3-D FDTD model of electromagnetic wave propagation in magnetized cold plasma," IEEE Trans. Antennas Propag., Vol. 58, 469-478, 2010.
doi:10.1109/TAP.2009.2037770

40. Blaunstein, N. and E. Plohotniuc, Ionosphere and Applied Aspects of Radio Communication and Radar, CRC Press, 2008.
doi:10.1201/9781420055177

41. Rawer, K., Wave Propagation in the Ionosphere, Vol. 5, Springer Science & Business Media, 2013.

42. Fletcher, C. A., "Computational galerkin methods," Computational Galerkin Methods, Springer, Berlin, 1984.

43. Carlson, H. C., W. E. Gordon, and R. L. Showen, "High frequency induced enhancements of the incoherent scatter spectrum at Arecibo," Journal of Geophysical Research, Vol. 77, 1242-1250, 1972.
doi:10.1029/JA077i007p01242

44. Depierreux, S., C. Labaune, J. Fuchs, D. Pesme, V. Tikhonchuk, and H. Baldis, "Langmuir decay instability cascade in laser-plasma experiments," Physical Review Letters, Vol. 89, 045001, 2002.
doi:10.1103/PhysRevLett.89.045001

45. Bryers, C., M. Kosch, A. Senior, M. Rietveld, and T. Yeoman, "The thresholds of ionospheric plasma instabilities pumped by high-frequency radio waves at EISCAT," J. Geophys. Res. --- Space Phys., Vol. 118, 7472-7481, 2013.
doi:10.1002/2013JA019429

46. Bernhardt, P., C. Tepley, and L. Duncan, "Airglow enhancements associated with plasma cavities formed during ionospheric heating experiments," J. Geophys. Res. --- Space Phys., Vol. 94, 9071-9092, 1989.
doi:10.1029/JA094iA07p09071

47. Cheng, M., B. Xu, Z. Wu, H. Li, Z. Wang, Z. Xu, et al. "Observation of VHF incoherent scatter spectra disturbed by HF heating," J. Atmos. Sol.-Terr. Phys., Vol. 105, 245-252, 2013.
doi:10.1016/j.jastp.2013.08.010

Dr. Jing Chen

Dr. Qingliang Li

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Dr. Guanglin Ma

Dr. Guang Yuan