Speaker
Dr
Andriy Ushakov
(Application engineer)
Description
Superconducting Radiofrequency Cavities as planned for BESSY-VSR or bERLinPro require a high stable RF field of the accelerating mode in order to allow as for VSR a stable RF beating scheme. Further, to ensure efficient operation at low RF power consumption, these type of cavities are operated at low coupling, i.e. narrow RF bandwidth. Hence, any disturbance to the system by unwanted cavity detuning can finally lead to the worst situation of a beam loss.
The modern SRF cavity control system should take into consideration not perfect model of microphonic disturbances, sensor noise and model instabilities as well as the limitation for the number of expensive sensors. To cope with such class of systems the general approach is based on using linear quadratic regulator together with an observer. The optimal observer based on so called Kalman Filter (KF) was tested nowadays as the data processing firmware in a real mTCA equipment. The input is provided by the virtual cavity representing software/hardware debugging complex and the real-time KF response is then examined. The test results shows relatively good correlation between predictable behavior and KF output.
Primary author
Dr
Andriy Ushakov
(Application engineer)
Co-authors
Dr
Axel Neumann
(Scientist, SRF)
Dr
Pablo Echevarria
(Helmholtz-Zentrum Berlin)
