Vacuum-compatible pulse selector for free-electron laser

Kudo, Togo; Hirono, Toko; Nagasono, Mitsuru; Yabashi, Makina
September 2009
Review of Scientific Instruments;Sep2009, Vol. 80 Issue 9, p093301
Academic Journal
We developed a vacuum-compatible pulse selector for a free-electron laser. A rotating cylinder with eight apertures in a vacuum is driven by a closed-loop stepping motor system through a magnetically coupled rotary feedthrough. A field programmable gate array is used to synchronize the cylinder rotation with a trigger signal of the accelerator at a maximum repetition rate of 60 Hz. We achieved to select specific pulses from a continuous pulse train of the SPring-8 Compact SASE Source.


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