Speaker
Description
During the startup, maintenance and user program a stable beam conditions are crucial for smooth operation of beamlines and instruments at many light sources, including European XFEL. For visual verification of the beam position and jitter, mostly invasive luminescent screens are used. These screens made of various materials are located at several locations along the beam path and can withstand particular photon intensity and flux. Excessive intensity within few x-ray pulses may damage the screen resulting in increased maintenance costs and operational down time.
At the European XFEL to protect these screens a set of Karabo control system services are deployed. The main functionality of these services includes calculation of screen damage thresholds and estimation of actual photon flux. In the case of an overdose the user is warned, the screen is retracted and moved to a predefined safe position.
In the contribution the current protection system and upcoming improvements of the optical luminescent screens in the Karabo control system at the European XFEL is presented.
