“…In the past two decades, a lot of fundamental problems were addressed. Let us mention some of them: deviation of the probability density function (PDF) of turbulent fluctuations from a normal distribution (see review [1]), a decrease in the turbulence level after the transition into the high-confinement mode (H-mode) [2][3][4][5][6], an increase in the level of short-wavelength density fluctuations ( r > is the fluctuations wavenumber, Т е is the electron temperature, М is the ion mass, and W i is the ion gyrofrequency) with increasing power of electron cyclotron resonance heating (ECRH), and correlation between the turbulence level and the growth rates of the electron temperature gradient mode and trapped electron mode [7][8][9][10][11][12]. Various statistical models of plasma turbulence have been created.…”