The interplay of regularizing factors in the model of upper hybrid oscillations of cold plasmaстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 13 июля 2022 г.
Аннотация:A one-dimensional nonlinear model of the so-called upper hybrid oscillations in a magnetoactive plasma is investigated taking into account electron-ion collisions. It is known that both the presence of an external magnetic field of strength $ B_0 $ and a sufficiently large collisional factor $ \nu $ help suppress the formation of a finite-dimensional singularity in a solution (breaking of oscillations). Nevertheless, the suppression mechanism is different: an external magnetic field increases the oscillation frequency, and collisions tend to stabilize the medium and suppress oscillations. In terms of the initial data and the coefficients $ B_0 $ and $ \nu $, we establish a criterion for maintaining the global smoothness of the solution.Namely, for fixed $ B_0 $ and $ \nu > 0 $ one can precisely divide the initial data into two classes: one leads to stabilization to the equilibrium, and the other leads to the destruction of the solution in a finite time. Next, we examine the nature of the stabilization. We show that for small $ |B_0| $ an increase in the intensity factor first leads to a change in the oscillatory behavior of the solution to monotonic damping, which is then again replaced by oscillatory damping. At large values of $ |B_0| $, the solution is characterized by oscillatory damping regardless of the value of the intensity factor $ \nu $.