Speaker
Mr
Sven Pfeiffer
(DESY)
Description
Stabilization of the bunch arrival time and compression is the main goal for the LLRF control system, which can be optimized by using beam information in additional feedback loops. Therefore a beam based feedback strategy is presented, distributing the control into three different time domains.
First a fast intra-train feedback loop acting on a us level during the macro-pulse reducing the arrival-time and compression jitter. This is further supported by a pulse to pulse feedback which minimizes residual control errors from the fast feedback by changes of the set-point trajectory. Finally a slow feedback loop acting in ranges of 1-10s, compensating slow drifts in the machine by modifying the set-point values.
Measurement results will be presented to discuss advantages of different methods. Finally the combination of beam and field feedbacks will be given.
Primary author
Mr
Sven Pfeiffer
(DESY)
