Generation mechanisms of zebra structures in solar radio emission on the background of complex dynamic spectra

The discussion about the origin of the zebra structure has been going on for more than 50 years. In many papers it is usually postulated that the double plasma resonance mechanism always works if there are fast particles in the magnetic trap. Due to a number of difficulties encountered by this mechanism, works on its improvement began to appear, mainly in a dozen papers by Karlitsky and Yasnov, where the whole discussion is based on the variability of the ratio of the magnetic field and density height scales and the assumption of some plasma turbulence in the source. Here we show the possibilities of an alternative model of interaction of plasma waves with whistlers. Several phenomena were selected in which it is clear that the ratio of height scales does not change in the magnetic loop as the source of the zebra structure. It was shown that all the main details of the sporadic zebra structure in the phenomenon of 1 August 2010 (and in many other phenomena) can be explained within the framework of a unified model of zebra structure and radio fibers (fiber bursts) in the interaction of plasma waves with whistlers. The main changes in the zebra structure bands are caused by the scattering of fast particles on whistlers, leading to switching of the whistler instability from the normal Doppler effect to the anomalous one. In the end, the possibilities of laboratory experiments are considered and the solar zebra structure is compared with similar bands in the decametre radio emission of Jupiter.