Design and control of emittance growth of a short bunch compressor for the international linear collider

We present a short two-stage bunch compressor system that has been selected as an alternative design in Baseline Configuration Design (BCD) for the ILC (International Linear Collider). The designed bunch compressor system has two rf sections and two chicanes in which each chicane consists of four bending magnets. The bunch compressor system has a 680 m long that shows relatively short system length compared to baseline design for the ILC. Beams with bunch length of 6 mm rms can be compressed to 0.15 mm rms in the bunch compressor system. We show the parameters of the bunch compressor and results of beam tracking including coherent and incoherent synchrotron radiations. We performed the lattice tuning such as corrections of orbit distortion, dispersion and skew components to control the emittance growths due to several machine errors in the bunch compressor system. It is shown that the system is error tolerant and the lattice tunings are very effective to suppress the emittance growth.