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Figure 4
A digital oscilloscope was used to record the phase locking of the beam chopper and the synchronization of a laser pulse to the X-ray temporal structure of the APS storage ring. The sextet, indicated by the arrow, is just visible through the transmission-time window. The ability to phase lock the rotation of the beam-chopper rotor to the orbital frequency of the storage ring allows for data collection without noticeable jitter in the recorded temporal structure of the ring loading pattern. The laser signal, positioned after the tenth triplet, was used as the scope trigger.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 7| Part 1| January 2000| Pages 1-4
doi:10.1107/S0909049599014582
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