24th International Workshop on ECR Ion Sources (ECRIS'20)

Numerical Simulations of Plasma Dynamics in ECRIS Afterglow

30 Sept 2020, 10:15

10m

Poster

Speaker

Li Lei (University of Electronic Science and Technology of China, Chengdu)

Description

Plasma dynamics in the afterglow of ECRIS has been
studied through the Particle-in-cell (PIC) simulations.
A full 3D implicit electrostatic PIC code was
developed to meet the needs of ECRIS simulations
and to study the characteristics of the ECR plasma
during the afterglow. The initial plasma parameters at
the simulation start-up were assumed by referring to
the experimental diagnostics of the ECRISs from IMP,
Lanzhou. The dynamics of electrons and ions in the
presence of the external magnetic field and at the
absence of the microwave energy were simulated to
study the mechanism of afterglow. Through the
abundant diagnostics of the 3D PIC simulation, some
ECR plasma features during afterglow including the
plasma potential and electron energy distributions
could be obtained and analyzed. The goal was to
determine the important evolutions that contribute to
the afterglow and thus to have a clearer
understanding of ECRIS afterglow mode.