Speaker
Description
The Advanced Photon Source Upgrade (APS-U) operates using swap-out injection, where depleted bunches in the storage ring are replaced by fresh bunches from the injector. Producing high charge (up to 20 nC) is particularly demanding on the injector chain, which consists of a linac, the Particle Accumulator Ring (PAR), and a booster synchrotron. To deliver these charge levels to the storage ring, the booster requires bunches with short duration (<600 ps) while tolerating relatively large energy spread. Compression using the 12th-harmonic cavity in the PAR alone is insufficient to meet these requirements at high charge. As an alternative, RF gymnastics can be applied near extraction in the PAR to further shorten the bunch. This work presents recent simulation and initial experimental results demonstrating longitudinal compression achieved by modulating the voltage and/or the phase of the 12th-harmonic cavity. The results provide a pathway to implement this in operation which would effectively reduce the bunch duration and enhance performance for high-charge APS-U operation.
Funding Agency
Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-ACO2-O6CH11357.
| In which format do you inted to submit your paper? | LaTeX |
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