Открытый доступ
Доступ предоставлен
Только для подписчиков
Том 43, № 9 (2016)
- Год: 2016
- Статей: 6
- URL: https://journals.rcsi.science/1068-3356/issue/view/14072
Article
Numerical simulation of ion-acoustic turbulence in the B. B. Kadomtsev model
Аннотация
The present report is devoted to the discussion of the properties of two equations relatively long ago proposed by B. B. Kadomtsev for the nonlinear theory of ion-acoustic plasma turbulence and some results of their solutions. We concern with these equations as objects of mathematical physics, focusing attention to both the approach to their study and arising numerical results.
261-265
Bose–Einstein condensate wave function and nonlinear Schrödinger equation
Аннотация
The nonlinear Schrödinger equation for the ground-state wave function of an inhomogeneous boson system is derived in the self-consistent Hartree–Fock approximation without the use of the formalism of anomalous averages. The results obtained correspond to the Gross–Pitaevskii equation for the Bose–Einstein condensate wave function when using the delta-shaped boson interaction potential.
266-269
Method of the phonon modulation of cryogenic hydrogen fuel structure in ITF targets
Аннотация
The possibility of spatial homogenization of the cryogenic hydrogen fuel structure in laser thermonuclear targets is considered. The results of a large cycle of experimental studies on low-temperature (T = 4.2 K) phonon modulation of the structure of solid hydrogen layers with various ortho-para compositions and its effect on the homogenization process rate are presented.
270-276
Dependence of helium ion diffusion and drift characteristics in own gas on its temperature
Аннотация
The low-temperature gas discharge has a number of features which can appear in experimentswith dusty plasma. For example, at cryogenic temperatures of gas-discharge tube walls, the strong anisotropy of the velocity distribution function of ions takes place, which in turn can cause a significant change in dust structure properties. The dependences of the helium ion drift characteristics in a dc uniform electric field on the atomic temperature of own gas is analyzed.
277-282
Temperature dependence of the kinetics rate of the melting and crystallization of aluminum
Аннотация
Using the molecular dynamics method, heterogeneous melting–crystallization of aluminum is simulated under conditions when the phase front propagates over the overheated-overcooled phase. The dependence of the phase front velocity on the temperature deviation from the equilibrium melting temperature is determined. The dependence obtained from atomistic simulation is used as an approximating function to obtain the temperature dependence of the kinetic rate in the analytical form. The steady-state temperature dependence of the kinetic rate v(Tsℓ) for extreme values of aluminum overheating-overcooling is constructed for the first time.
283-286
Interaction of high-speed and transient fluxes of solar wind at the maximum of solar cycle 24
Аннотация
The interaction of the interplanetary coronal mass ejection (ICME) and the high-speed solar wind flux (HSSWF) associated with the coronal hole (CH) is considered. By the examples of two events at the maximum of solar cycle 24 from June 4 to June 16 and from June 30 to July 10, 2012 it is shown that the temperature-dependent parameters of the SW ionic composition appear closer to the values in the HSSWF than in the ICME due to mixing of fluxes in the corona when the ICME source is near the CH boundary.
287-290