Measurements of transverse emittance growth due to coherent synchrotron radiation in the SLAC SPPS bunch compressor Chicane

A four-dipole bunch compressor chicane has recently been installed in the SLAC linac at 9 GeV and is capable of compressing a 3.4-nC electron bunch to an rms length of 50 microns, resulting in a peak current of nearly 10 kA. The electron bunch is extracted from a damping ring with normalized horizontal emittance of ~30 mum. We present preliminary measurements of the initial and final emittance in the chicane and compare these to 1D and 3D calculations of the effects of coherent synchrotron radiation (CSR)