• R.W. Garnett, J.A. Billen, T.P. Wangler
  LANL, Los Alamos, New Mexico
• K.R. Crandall
  TechSource, Santa Fe, New Mexico
• P.N. Ostroumov
  ANL, Argonne, Illinois
• J. Qiang, R.D. Ryne
  LBNL, Berkeley, California
• R.C. York, Q. Zhao
  NSCL, East Lansing, Michigan

We are developing multuparticle beam-dynamics simulation codes for RIA driver linac simulations extending from the low-energy beam transport line to the end of the linac. These codes run on the NERSC parallel supercomputing platforms at LBNL, which allow us to run simulations with large numbers of macroparticles. The codes have physics capabilities needed for RIA, including transport and acceleration of multiple-charge-state beams, beam-line elements such as high-voltage platforms within the linac, interdigital accelerating structures, charge-stripper foils, and capabilities for handling the effects of machine errors and other off-normal conditions. In this paper we present the status of the work, describe some recent additions to the codes, and show preliminary end-to-end simulation results for a representative driver-linac design.