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Timing Synchronization System for Beam Injection from the SACLA Linac to the SPring-8 Storage Ring by T Ohshima; H Maesaka; N Hosoda; S Matsubara is a Physics and Astronomy article available to read on EtoBox.

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## Abstract We developed a timing synchronization system for injection from the linac of the XFEL machine, SACLA, to the storage ring (SR) of SPring-8. This injection scheme is demanded by the low-emittance upgraded ring in the future. Since the RF frequencies of the linac and the SR do not have an integer multiples relation, we have to introduce a new scheme to synchronize the beam ejection timing of the linac to the desired RF bucket timing of the SR. The timing is roughly adjusted by re-clocking the master trigger signal of the linac with the SR bucket timing. The residual timing difference is compensated by applying frequency modulation to the linac master oscillator. The amount of the timing difference is obtained by sampling the linac reference signal with an ADC where the SR reference signal is used as a sampling clock. We built this synchronizing system with MTCA.4 modules. The system was installed to the linac and the measured timing jitter was better than 4 ps in rms, which was enough to obtain high injection efficiency.

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Author

T Ohshima; H Maesaka; N Hosoda; S Matsubara

Publisher

Institute of Physics; IOP Publishing (ISSN 1742-6588)

Published

2019

Language

EN

Field

Physics and Astronomy (Physical Sciences)