AP19679536 " Investigation of the properties of positrons generated by runaway electrons in thermonuclear reactors with magnetic confinement"

Relevance

The relevance of the project is to study the effect of the kappa distribution of electrons on the generation of runaway positrons, which is important for more accurate modeling of plasma processes and interactions in astrophysical objects and thermonuclear installations. The results obtained will help improve understanding of the behavior of high-energy particles in magnetic fields, which may be useful for developing effective technologies in the field of plasma physics and thermonuclear fusion control.

Purpose

The aim of this work is to study the effect of the kappa distribution of electrons on the generation of runaway positrons.

Expected and achieved results

It was investigated how the distribution of electrons in a Lorentz plasma changes along pulses directed perpendicular or parallel to the magnetic field. It is known that in a Lorentz plasma with the so-called Kappa distribution of electrons, the Coulomb logarithm decreases with a decrease in the spectral index (k). This decrease in the Coulomb logarithm leads to an increase in the distribution of escaping electrons along the parallel pulse and a decrease in the distribution of escaping electrons along the perpendicular pulse, since a lower value of the Coulomb collision cross section leads to a stronger retention of electrons by the magnetic field. Next, the process of positron generation by escaping electrons was investigated. The average energy of positrons generated by escaping electrons and the rate of positron generation as a function of the energy of the escaping electrons were calculated. The average energy decreases, and the rate of positron production has a maximum. A comparison of the results performed for the Maxwell distribution and the Kappa distribution showed for the first time that the rate of positron production in the first case is higher than the data obtained with the kappa distribution.Positron distribution functions and positron scattering cross sections were also calculated.

Research team members with their identifiers (Scopus Author ID, Researcher ID, ORCID, if available) and links to relevant profiles

Scientific supervisor - Murat Kurmanovich Dzhumagulov

List of publications with links to them

Керимкулова А. Ж. и др. Экстракционная сероочистка нефтяного топлива с использованием глубокоэвтектических растворителей //Вестник Университета Шакарима. Серия технические науки. – 2024. – Т. 1. – №. 2 (14). – С. 481-495.