Oct 9 – 13, 2022
FHNW Campus Brugg-Windisch
Europe/Zurich timezone

Development of pulse-by-pulse RF switching in PAL-XFEL LLRF for dual beamlines

Oct 12, 2022, 2:55 PM
Lichthof (Building 1)


Building 1

Poster Low Level RF Workshop 2022 Poster Session


Jinyul Hu (PAL, POSTECH)


Though XFEL(X-ray Free Electron Laser) machines can produce X-ray pulses over 100 million times brighter than storage-ring-based machines, the XFEL machines have very limited beamlines of 1~3. PAL-XFEL machine includes one hard and one soft X-ray beamlines, but only one beamline can be serviced at each shift period. Efforts to operate the beamlines of PAL-XFEL simultaneously have been made in a manner that bunches of repetition rate 60Hz are directed to each beamline in pulse-by-pulse and real-time style. Because function of real-time and pulse-by-pulse RF-parameter switching was also essentially required for PAL-XFEL LLRFs not had been considered at all, a development was performed by software modification of PAL-XFEL LLRFs without changing any related hardwares. PAL-XFEL including this function of LLRFs was operated without any problem in test operation. It is expected usual and simultaneous service of beamlines near future.

Primary author

Jinyul Hu (PAL, POSTECH)


Presentation materials