2018/12/08 by Alex Estupiñán, Estupiñán, Alex, E A Orozco +7
Engineering · Physics and Astronomy · #Computational Physics (physics.comp-ph) #FOS: Physical sciences #Laser-Plasma Interactions and Diagnostics #Magnetic confinement fusion research #Particle accelerators and beam dynamics #Plasma Diagnostics and Applications #Plasma Physics (physics.plasm-ph)
paper · pdf · doi:10.48550/arxiv.1812.03391
openalex publication_date 2018/12/08 · openalex created_date 2022/08/23 · openalex updated_date 2026/07/28
A lot of plasma physics problems are not amenable to exact solutions due to\nmany reasons. It is worth mentioning among them, for example, nonlinearity of\nthe motion equations, variable coefficients or non lineal conditions on known\nor unknown borders. To solve these problems, different types of approximations\nwhich are combinations of analytical and numerical simulation methods are put\ninto practice. The problem of plasma behavior in numerous varieties of a\nminimum-B magnetic trap where the plasma is heated under electron cyclotron\nresonance (ECR) conditions is the subject of numerical simulation studies. At\npresent, the ECR minimum-B trap forms the principal part of the multicharge ion\nsources.\n In this work, a scheme of the relativistic Particle-in-Cell (PIC) code\nelaborated for an ECR plasma heating study in minimum-B traps is presented. For\na PIC numerical simulation, the code is applied to an ECR plasma confined in a\nminimum-B trap formed by two current coils generating a mirror magnetic\nconfiguration and a hexapole permanent magnetic bars to suppress the MHD\ninstabilities. The plasma is maintained in a cylindrical chamber excited at\nTE111 mode by 2.45 GHz microwave power. In the obtained magnetostatic\nfield, the ECR conditions are fulfilled on a closed surface of ellipsoidal\ntype. Initially, a Maxwellian homogeneous plasma from ionic temperature of 2\neV being during 81.62 ns, that correspond to 200 cycles of microwaves\nwith an amplitude in the electric field of 1 kV/cm is heated. The electron\npopulation can be divided conditionally into a cold group of energies smaller\nthan 0.2 keV, a warm group whose energies are in a range of 3-10 keV\nand hot electrons whose energies are found higher than 10 keV.\n