Dynamic Tuning of the APS-U Booster 5-cell Cavities Article Swipe

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Booster (rocketry) Tuner Fermilab Bunches Magnet Storage ring Synchrotron Ferrite (magnet) Materials science Particle accelerator Swap (finance) Physics Electrical engineering Beam (structure) Engineering Radio frequency Optics Nuclear physics Aerospace engineering Finance Economics

G. Waldschmidt , Melike Abliz , T. Berenc , Douglas Horan , U. Wienands ·

YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.18429/jacow-ipac2018-tupmf003 · OA: W3100148897

The booster synchrotron for the APS-U is being upgraded to accommodate high-charge bunches, up to 20 nC, for extraction into the MBA lattice. The booster is required to operate at 85% efficiency in order to achieve bunch swap-out into the storage ring. In order to compensate for significant beam-loading effects as well as support a frequency ramp to achieve higher efficiency, a ferrite tuner is being considered to dynamically adjust the cavity frequency. A tuner design will be presented that spans 60 kHz and utilizes a low-loss YIG garnet similar to that used in the Recycler Ring at Fermilab.