Speaker
Anna Efimova
(The Institute of Computational Mathematics and Mathematical Geophysics SB RAS)
Description
Computer simulation of dynamic of plasma target for highly efficient neutralization of powerful negative ion beams is considered. The plasma is confined within a magnetic trap with multipole magnetic walls. The inverse magnetic mirrors to limit plasma outflow through the inlet and outlet holes in the trap are used. Mathematical model is based on Boltzmann’s equation for the distribution functions for ions and electrons and system of the Maxwell’s equations for the self-consistent electromagnetic fields. The combination of the modified PIC-method in the cylindrical r-z coordinates and the Monte-Carlo methods is used to solve these equations. The complex nature of the processes studied, and also the need of calculation of trajectories of billions of particles required the use scalable parallel algorithm. The use of modern supercomputers has allowed to calculate plasma dynamics, to determine plasma streams both on the walls of the trap and through end holes. According to the results of calculations, the generated plasma fills almost the entire length of the trap. The plasma outflow in end holes is sufficiently small, the loss of the plasma on the walls of the trap is inessential. Introducing of the recombination cross sections to the mathematical model will allow determining plasma lifetime and energy balance of the trap.
The development of numerical algorithms was supported by the Russian scientific
Fund, project no. 16-11-10028, computational experiments were supported by the Russian Foundation for Basic Research, project no. 16-01-00209, 14-01-00392, 16-31-00304.
Primary author
Evgeny Berendeev
(The Institute of Computational Mathematics and Mathematical Geophysics SB RAS)
Co-authors
Andrey Ivanov
(Budker institute of nuclear physics SB RAS)
Anna Efimova
(The Institute of Computational Mathematics and Mathematical Geophysics SB RAS)
Galina Dudnikova
(The Institute of Computational Technologies of SB RAS)
Vitaly Vshivkov
(The Institute of Computational Mathematics and Mathematical Geophysics SB RAS)
Peer reviewing
Paper
Paper files:
