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PIC simulations of beam dynamics experiments planned for the high current experiment

This paper reports progress on simulation of the High Current Experiment (HCX), a heavy ion accelerator at LBNL built to explore transport of intense beams at the scale of a heavy ion fusion power plant driver. The 2D particle-in-cell (PIC) code WARPxy was used to the explore the effect of image forces, distribution function, and focusing nonlinearities on the dynamic aperture of the electrostatic focusing system for the HCX, as well as the effect on dynamics of misalignments and quadrupole rotations. Simulations using a semiGaussian initial distribution are compared to results for a more realistic distribution function obtained by initializing a space-charge-dominated beam at the emitter and propagating it through the aberrations of the injector and matching section.