Simulation Studies of the Slc Bunch Compressor (rtl)*

In the 1994/95 SLC run, bunch lengthening in the damping ring along with overcompression in the two ring-to-linac transport lines (RTLs) have caused a normal beam loss of about 10-20% between entrance and end of the RTLs, which constitutes a major hindrance to further luminosity increases of the SLC. This paper summarizes studies of both longitudinal and six-dimensional dynamics in the RTL, and compares simulation results with measurements. Quadratic dependence of path length on energy and higherorder multipoles in the RTL quadrupoles are shown to affect the compressor performance. Minor optics changes are suggested which may improve the transmission efficiency.