29 research outputs found
The comparison of extraction of energy in two-cascade and one-cascade targets
The paper is devoted to numerical designing of cylindrical microtargets on the basis of shock-free compression. When designing microtargets for the controlled thermonuclear fusion, the core tasks are to select geometry and make-up of layers, and the law of energy embedding as well, which allow receiving of “burning” of deuterium- tritium mix, that is, the existence of thermonuclear reactions of working area. Yet, the energy yield as a result of thermonuclear reactions has to be more than the embedded energy (the coefficient of amplification is more than a unit). So, an important issue is the value of the embedded energy. The purpose of the present paper is to study the extraction of energy by working DT area in one-cascade and two-cascade targets. A bigger extraction of energy will contribute to a better burning of DT mix and a bigger energy yield as a result of thermonuclear reactions. The comparison of analytical results to numerical calculations is carried out. The received results show advantages of a two-cascade target compared to a one-cascade one
The comparison of extraction of energy in two-cascade and one-cascade targets
The paper is devoted to numerical designing of cylindrical microtargets on the basis of shock-free compression. When designing microtargets for the controlled thermonuclear fusion, the core tasks are to select geometry and make-up of layers, and the law of energy embedding as well, which allow receiving of “burning” of deuterium- tritium mix, that is, the existence of thermonuclear reactions of working area. Yet, the energy yield as a result of thermonuclear reactions has to be more than the embedded energy (the coefficient of amplification is more than a unit). So, an important issue is the value of the embedded energy. The purpose of the present paper is to study the extraction of energy by working DT area in one-cascade and two-cascade targets. A bigger extraction of energy will contribute to a better burning of DT mix and a bigger energy yield as a result of thermonuclear reactions. The comparison of analytical results to numerical calculations is carried out. The received results show advantages of a two-cascade target compared to a one-cascade one
The influence of the transport of fast charged particles in burning fusion targets
Abstract:
For an adequate description of the physics of laser plasma it is necessary to consider a large number of physical processes. One of them is the transfer of energy of a fast particle products of thermonuclear reactions. The problem of the birth and transfer of the charged particles resulting from fusion reactions in a burning deuterium-tritium plasma, is very significant. It is important to reflect in the model, where and how charged particles give up their energy, i.e. to calculate the non-stationary transfer of energy of the fast charged particles. The paper presents a model calculation of the transport of α-particles, we numerically investigate the influence of this process on the parameters of the target.Note:
Research direction:Mathematical problems and theory of numerical method
Numerical solvation of equations, describing the transfer of heat by electrons and ions
Abstract:
Solving the great variety of tasks the one of the most significant processes is a transfer of heat. For mathematical description of this process mostly the law of Fourier (diffusive approaching) is used. This approaching is limited with small temperature gradients. The simplest and widespread enough model is the modification of diffusive stream either by limiting with the maximally possible stream or applying the method of the nonlocal approaching for description of a heat transfer. At the nonlocal approaching a stream takes into account the influence of all points of the system on this point by means of kernel depending on optical properties of the system.
A few approaching is in-process considered, the results of calculations are compared, positive and negative descriptions of the examined approaching are analyzed, the optimal approaching is chosen both from the point of view of exactness and to counting time.Note:
Research direction:Mathematical problems and theory of numerical method