  The numerical solution of the Vlasov-Fokker-Planck equation is a well
established method to simulate the dynamics, including the self-interaction
with its own wake field, of an electron bunch in a storage ring. In this paper
we present Inovesa, a modularly extensible program that uses OpenCL to
massively parallelize the computation. It allows a standard desktop PC to work
with appropriate accuracy and yield reliable results within minutes. We provide
numerical stability-studies over a wide parameter range and compare our
numerical findings to known results. Simulation results for the case of
coherent synchrotron radiation will be compared to measurements that probe the
effects of the micro-bunching instability occurring in the short bunch
operation at ANKA. It will be shown that the impedance model based on the
shielding effect of two parallel plates can not only describe the instability
threshold, but also the presence of multiple regimes that show differences in
the emission of coherent synchrotron radiation.

Accelerator Physics