Recent Improvements of PLACET

PLACET[1] is a program used to simulate the dynamics, including wakefields, of a beam in the main accelerating or decelerating part of a linac. It allows for the investigation of single- and multi-bunch effects, the simulation of normal RF cavities with relatively low group velocities, as well as transfer structures specific to CLIC. Recent improvements, including the possibility to simulate bunch compressors, ground motion, and the use of parallel computer systems, are presented in this paper