Speaker
Description
The design of modern particle accelerators critically depends on accurate beam dynamics calculations. Simulating multi-component beams, which include particles with different charge-to-mass ratios, presents particular challenges. This includes the task of accounting for the space charge neutralization effect of the primary beam in low-energy transport channels. Currently used Particle-in-Cell (PIC) methods for such problems are very computationally intensive, while the current tube method for two-component beams is not yet sufficiently developed.
The simulation code was written in C++ using the IBSimu library [1]. This library provides algorithms for numerically solving the Poisson equation, space charge deposition on grid, integration equations of motion, etc. The resulting algorithm is a modification of the current tube method. The simulation itself is an iterative process where electron charge accumulates along the ion trajectories, leading to a steady-state solution.
Distribution of electron space charge from one of iteration during the beam neutralization modeling cycle, accounting for the solenoid magnetic field
Three models of ion beam dynamics are presented: no compensation, electron compensation, and 10% compensation degree. Key parameters, including beam envelopes, Twiss parameters, and space charge compensation factor along the beam path were compared.
References
- https://ibsimu.sourceforge.net