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Figure 3
Determination of the light arrival time at the ICCD. The ICCD signal is measured with varying gate delay after bunch clock synchronization during the 24-bunch mode, in which X-ray pulses arrive every 153.4 ns. The gate width is fixed at 7 ns, shorter than a normal experimental gate, to increase contrast in the signal as a function of delay. The light arrival time is fitted using the model of equation (2)[link], of two sequential phosphors with single exponential decays and lifetimes of 26.2 ns and 70.4 ns. These lifetime parameters were determined from a fit of equation (1)[link] to similar data taken in the Hybrid mode (inset), where X-ray pulses are separated by 1.6 µs.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 4| July 2021| Pages 1216-1228
https://doi.org/10.1107/S1600577521003775
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