Abstract and keywords
Abstract (English):
We present the result of the studies into characteristics of high-latitude ionospheric F-region longitudinal plasma waves (Langmuir and ion-acoustic), caused by the impact of powerful HF radio waves of ordinary (O-mode) or extraordinary (X-mode) polarization of the EISCAT/Heating facility, Tromsø, Norway. The powerful HF radio waves on October 20, 2012 and February 26, 2013 were emitted in the direction of the magnetic zenith with a step change in the effective radiation power (ERP). The radiation frequency fH of the EISCAT/Heating facility on February 26, 2013 was close to the F2-layer critical frequency foF2 (fH/foF2~1) and exceeded the electron gyroresonance frequency fH>5fce. On October 20, 2012, the conditions fH/foF2~0.85–0.95 and fH<6fce were fulfilled. Analysis of EISCAT measurements of an incoherent scatter radar (ISR) at a frequency of 930 MHz, spatially aligned with the heating facility for radiation conditions ERP<200 MW, has shown that parametric decay instabilities are excited at the ionospheric heights where the pump frequency is close to the plasma Langmuir frequency, fH≈fPL. We have studied peculiarities of excitation of the decay parametric instabilities as a function of height in the ionosphere and pump wave polarization, the ratios between fH and foF2, and also fH and nfce.

high-latitude ionosphere, F-region, powerful HF radio wave, Langmuir wave, ion-acoustic wave, incoherent scatter, EISCAT
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1. Blagoveshchenskaya N.F. Perturbing the high-latitude upper ionosphere (F region) with powerful HF radio waves: A 25-year collaboration with EISCAT. URSI Radio Sci. Bull. 2020, iss. 373, pp. 40-55. DOI:https://doi.org/10.23919/URSIRSB.2020.9318436.

2. Borisova T.D., Blagoveshchenskaya N.F., Yeoman T.K., Hagstrom I. Influence of effective radiation power of EISCAT/Heating facility on artificial ionospheric turbulences induced in high-latitude F region. Izvestiya vuzov. Radiofizika [Radiophysics and Quantum Electronics]. 2017, vol. 60, no. 4, pp. 305-325. (In Russian).

3. Borisova T.D., Blagoveshchenskaya N.F., Rietveld M.T., Hagstrom I. Shifted plasma lines in heating experiments in high-latitude ionosphere at pump wave frequencies near harmonics of electron gyroresonances. Izvestiya vuzov. Radiofizika [Radiophysics and Quantum Electronics]. 2018, vol. 61, no. 10, pp. 810-830. (In Russian).

4. Borisova T.D., Blagoveshchenskaya N.F., Kalishin A.S. Features of artificial ionosphere turbulence induced by the O- and X-mode HF heating near the f2-layer critical frequency. Solar-Terr. Phys. 2023, vol. 9, no. 1, pp. 21-30. DOI:https://doi.org/10.12737/stp-91202303.

5. DuBois D.F., Russell D.A., Cheung P.Y., Sulzer M.P. High-power high-frequency-induced Langmuir turbulence in the smooth ionosphere at Arecibo. I. Theoretical predictions for altitude-resolved plasma line radar spectra. Phys. Plasmas. 2001, vol. 8, no. 3, p. 791. DOI:https://doi.org/10.1063/1.1345703.

6. Grach S.M., Karashtin A.N., Mityakov N.A., Rapoport V.O., Trakhtengerts V.Yu. Parametric interaction between electromagnetic radiation and ionospheric plasma. Radiophysics and Quantum Electronics. 1977, vol. 20, pp. 1254-1258.

7. Gurevich A.V. Nonlinear phenomena in the ionosphere. Uspekhi fizicheskikh nauk [Physics-Uspekhi]. 2007, vol. 177, no. 11, pp. 1145-1177.

8. Kuo S.P., Lee M.C. Cascade spectrum of HF enhanced plasma lines generated in HF heating experiments. J. Geophys. Res. 2005, vol. 110, iss. A1, p. A01309. DOI:https://doi.org/10.1029/2004 JA010674.

9. Lehtinen M.S., Huuskonen A. General incoherent scatter analysis and GUISDAP. J. Atmos. Terr. Phys. 1996, vol. 58, no. 1-4, p. 435-452.

10. Mishin E., Hagfors T., Kofman W. On the origin of outshifted plasma lines during HF modification experiments. J. Geophys. Res. 1997, vol. 102, no. A12, p. 27,265.

11. Rietveld M.T., Senior A., Markkanen J., Westman A. New capabilities of the upgraded EISCAT high-power HF facility. Radio Sci. 2016, vol. 51, no. 9, pp. 1533-1546. DOI: 10.1002/ 2016RS006093.

12. Rishbeth H., van Eyken A.P. EISCAT - early history and the first ten years of operation. J. Atmos. Terr. Phys. 1993, vol. 55, no. 4-5, pp. 525-542.

13. Robinson T.R. The heating of the high latitude ionosphere by high power radio waves. Phys. Rep. 1989, vol. 179, no. 2-3, pp. 79-209.

14. Stubbe P. Review of ionospheric modication experiments in Tromsø. J. Atmos. Terr. Phys. 1996, vol. 58, no. 1-4, pp. 349-386.

15. Vaskov V.V., Gurevich A.V. Self-focusing instability in the ionospheric F region. Thermal Nonlinear Phenomena in Plasma. Gorky, IPF AN SSSR, 1979, pp. 81-138.

16. URL: https://rscf.ru/project/22-17-00020/ (accessed May 23, 2023).

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