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Figure 4
(a) A schematic of the electron fill pattern in APS standard mode (24-bunch mode). The bunch separation was 153 ns (ta–tb). The length of each pulse was 33.5 ps. (b) The electron fill pattern for APS hybrid mode. The separation between the singlet and the superbunch (tc–td and te–tc) was 1.58 µs. The separation between septuplet groups (te–tf) was 51 ns. The total duration for the septuplet bunch (td–te) was 500 ns. The lengths of the singlet and septuplet bunches were 50 and 27 ps, respectively. (c) Timing and synchronization schemes for the laser AM experiments performed in hybrid mode. P0 are the synchrotron radio-frequency pulses (master clock), separated by 3.68 µs. For experiments performed in standard mode, synchronization with the master clock was not required.

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