Abstract
Precision feedback control of a normal conducting standing wave resonator cavity
Highlights
The European X-Ray Free Electron Laser (European XFEL) is a 3.5 km long facility starting at the Deutsches Elektronen-Synchrotron (DESY, Germany) in the northwestern direction to the town Schenefeld
Since 2005 DESY operates the free electron laser in Hamburg (FLASH) as a user facility serving as a test bed for the European XFEL
The rf field amplitude and phase is maintained during flattop while electron bunches are injected with maximum repetition rate of 3 MHz at FLASH and 4.5 MHz at the European XFEL
Summary
The European X-Ray Free Electron Laser (European XFEL) is a 3.5 km long facility starting at the Deutsches Elektronen-Synchrotron (DESY, Germany) in the northwestern direction to the town Schenefeld. Since 2005 DESY operates the free electron laser in Hamburg (FLASH) as a user facility serving as a test bed for the European XFEL. The precision feedback control scheme presented in this paper has been extensively tested and operated at FLASH. Both facilities are driven in a pulsed mode with 10 Hz repetition rate. The MIMO controller was set up in order to increase the rf field stability for the superconducting acceleration modules [2].
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