Towards a Rational Dynamics of Plasmas (Benach) (original) (raw)

On The Mechanism And Behavior Of Plasma

Mathematical Theory and Modeling, 2013

The charged particles' action of E and B fields have three diverse levels of modeling, Starting with the simplest one to the most complicated. In this paper we consider the generalization of Newtonian force law in geometrical term is to describe charged particles' (plasma) trajectories on electromagnetic fields in the kinetic or microscopic model.

The unusual properties of plasmas

La Rivista del Nuovo Cimento, 2020

Sixty years ago Enrico Persico gave two seminars, one in Messina and one in Palermo, with the title “Le strane proprietà del plasma” which we freely translated as the title of the present article. Is what was unusual 60 years ago, in a sense, still unusual now? Possibly the “non reductionist approach” that the study of plasmas requires. Again, freely translating from the seminar notes [ 1 ] “ This field of physics is characterised by the fact that, even if the laws that describe the elementary microscopic forces are known, the different phenomena that take place in plasmas are so intertwined that predicting, or even just interpreting, the plasma macroscopic behaviour is often extremely difficult”. Where does this intertwining come from? And, is it universal? Often in multibody systems the presence of thermodynamic equilibrium puts to rest most of the details in the system behaviour that arise from the peculiarities of the interaction forces. But in plasmas even local thermodynamic equilibrium is generally not present: this is a fundamental property of electromagnetic interactions in dilute systems. And plasmas constitute most of the visible matter in the Universe.

Introduction: Plasma Parameters and Simplest Models

Plasma Science [Working Title], 2020

Plasma is ionized gas (partially or fully). Overwhelming majority of matter in the universe is in plasma state (stars, Sun, etc.). Basic parameters of plasma state are given briefly as well as classification of plasma types: classic-quantum, idealnonideal, etc. Differences between plasma and neutral gas are presented. Plasma properties are determined by long distance electrostatic forces. If spatial dimensions of a system of charged particles exceed the so-called Debye radius, the system may be considered as plasma, that is, a medium with qualitatively new properties. The expressions for Debye radius for classical and quantum plasma are carried out. Basic principles of plasma description are presented. It is shown that plasma is a subject to specific electrostatic (or Langmuir) oscillations and instabilities. Simplest plasma models are given briefly: the model of "test" particle and model of two (electron and ion) fluids. As an example, Buneman instability is presented along with qualitative analysis of its complicate dispersion relation. Such analysis is typical in plasma theory. It allows to easily obtain the growth rate.

Rational paradigm of plasma physics

In recent studies we have multiply envisioned the irrationality of the traditional plasma kinetis [1--5]. Its basic false cornerstone was shown to be the substitution of real plasmas by plasma probabilistic ensembles [1--3]. We have created culture of plasma studies with refrain from an ensemble substitution [1-8]. We discovered intense decay of Langmuir quanta, as opposite to traditional deduction of their conservation [1-3]. The quanta decay prevents formation of Langmuir condensate in a weak Langmuir turbulence [1, Appendix], suppresses long-wavelength plasma modulational instability [3], precludes Langmuir wave collapses [1-3]. Besides, it helped to highlight the uselessness of hydrodynamic modelling of plasma nonlinear phenomena [2-3], to state an inadequateness of modelling collisionless plasma by the Vlasov equation [3], to state of inadequateness of ``Particle in Cell'' method of numerical plasma simulation to the plasma nature [3]. Finally, it was shown that existed...