Beam Parameter Estimation for Beam Position Measurements at the SIS18 Accelerator

A new approach for digital Beam Position Monitor (BPM) measurements, dedicated to accelerators using bunched particle beams is introduced. The aim is to create a stand-alone system which provides a bunch-by-bunch resolution in time, as well as a position resolution of 100¿m for each bunch. This resolution provides a precise beam position, which can be used for a better control of following acceleration cycles, and improve the quality of off-line analysis. The online bunch-by-bunch modus provides data for a feedback system to optimize acceleration parameters. The implemented model gives a good estimate for different bunch parameters during acceleration, which are needed for the reconstruction of the beam position. This paper addresses the estimation and the acquisition of the beam parameters as defined by our bunch model.