Title :
A 3D Parallel Beam Dynamics Code for Modeling High Brightness Beams in Photoinjectors
Author :
Qiang, J. ; Lidia, S. ; Ryne, R. ; Limborg, C.
Author_Institution :
LBNL, Berkeley, CA 94547, USA; jqiang@lbl.gov
Abstract :
In this paper we report on IMPACT-T, a 3D beam dynamics code for modeling high brightness beams in photoinjectors and rf linacs. IMPACT-T is one of the few codes used in the photoinjector community that has a parallel implementation, making it very useful for high statistics simulations of beam halos and beam diagnostics. It has a comprehensive set of beamline elements, and furthermore allows arbitrary overlap of their fields. It is unique in its use of space-charge solvers based on an integrated Green function to efficiently and accurately treat beams with large aspect ratio, and a shifted Green function to efficiently treat image charge effects of a cathode. It is also unique in its inclusion of energy binning in the space-charge calculation to model beams with large energy spread. Together, all these features make IMPACT-T a powerful and versatile tool for modeling beams in photoinjectors and other systems. In this paper we describe the code features and present results of IMPACT-T simulations of the LCLS photoinjectors. We also include a comparison of IMPACT-T and PARMELA results.
Keywords :
Brightness; Cathodes; Computational modeling; Computer simulation; Green function; Laser beams; Particle beams; Physics computing; Power system modeling; Radiation effects;
Conference_Titel :
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the
Print_ISBN :
0-7803-8859-3
DOI :
10.1109/PAC.2005.1591453