Using TraFiC4 to calculate and minimize emittance growth due to coherent synchrotron radiation

Coherent synchrotron radiation occurs when short bunches travel on strongly bent trajectories. Its effects on high-quality beams can be severe and are well understood qualitatively. For quantitative results, however, one has to rely on numerical methods. The recent interest in high quality, high-current electron beams has generated considerable efforts to understand and minimize the effects of CSR on beam quality. By now several simulation codes, utilizing different approaches and making different approximations, exist. We describe in some detail the coder TraFiC4 developed at DESY for design and analysis purposes. It calculates the fields acting on the pariticles from first principles and tracks particles through them in the laboratory frame. We present calculational results for three applications and give some comparison with experimental data.