V.B. Lapshin - Dr. Sc. (Phys.-Math.), Professor, Director Institute of Applied Geophysics n.a. E.K. Fedorov (Moscow) E-mail: director@ipg.geospace.ru N.G. Kotonaeva - Dr. Sc. (Phys.-Math.), Deputy Head of Department, Institute of Applied Geophysics n.a. E.K. Fedorov (Moscow) E-mail: kongt@yandex.ru E.S. Perminova - Junior Research Scientist, Institute of Applied Geophysics n.a. E.K. Fedorov (Moscow) E-mail: ekaterina.perminova@phystech.edu

The article shows the comparison of braking and cyclotron radiation power in conditions of ionospheric plasma heating. The dependence of numerical values of braking and cyclotron radiation power on altitude and on the different radiation power of HAARP, SURA, EISCAT have been estimated. The conditions when the power of cyclotron radiation exceed the power of braking radiation have been established. The calculation have been made when plasma is considering as collective of free-moving in applied field charge particles. From the results, it is concluded that: 1. The total power of the braking radiation of electron at height of 100 km without considering absorption of HF radio waves at of the D layer or taking into account the smallest absorption can be about 1,6-10−28 W. The value is by a two orders of magnitude more than the cyclotron radiation, which makes about 1,8-10−30 W at the same altitude. This result has been estimated in conditions of full effective radiated power operation of HAARP. At the same time for SURA, the values of braking and cyclotron radiation differ by 6. Under the influence of peak absorption, this difference between radiations halve. 2. The equality of braking and cyclotron radiation is achieved at heights about 150 км for SURA and about 300 km for HAARP. The al-titudes is estimated as 180 km and 400 km without considering absorption at of the D layer. Above these heights, the cyclotron radiation makes the main contribution to radiation of electron. 3. HF radio waves will make a notable contribution to radiation of electron at altitudes of main peak electron density if the ionospheric plasma heating is realized at the effective radiated power more than 5 GW.

 

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