Karbyshev

pp.800-816

In this work processes of formation of the drift turbulence in plasma with regard to existence condition of H‑mode were investigated for the first time. An effect of the drift wave of finite magnitude on plasma was considered. Influence of a poloidal plasma flow with linear velocity distribution v_y(x) = Cx on a drift wave was also taken into account. A model was proposed and a program was developed for calculating the perturbations’ characteristics, which occur as a result of the specified influence. Dependencies of average values of plasma density fluctuations on the shear of velocity C and the growth rate of a drift wave γ were also obtained.

The experiment showed effects of growth and destruction of drift waves which are directly responsible for plasma turbulence. As at the linear approximation of such waves the oscillation amplitude in the plasma is assumed to be small; it is impossible to to assess its value. The paper takes into account the amplitude finiteness of the drift wave and considers qualitatively the drift wave instability dynamics at nonlinear approximation. On the basis of this analysis it is shown that the presence of a linear velocity profile leads to wave breaking and suppression of turbulence. The authors obtained different characteristics depending on the nonlinear factor, increment of growth, wavelength, and initial amplitude.

The effects of drift wave growing and destruction are presented in experiments and they are corresponded for turbulence in plasma. There is no way to find the amplitude of such waves at linear approach, because it considerably small. Amplitude growth is taken into account in paper and dynamics of drift wave instability are considered at nonlinear approach. The last analysis showed that the presence of linear velocity profile lead to overturn of wave and turbulence suppression. Some characteristics are obtained at different nonlinear factor, growing rate, wave length and beginning amplitude.

A number of reactions of the synthesis going between kernels of easy elements with allocation of energy is known. These reactions, basically, can be used for creation of powerful energy sources.