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@inproceedings{gavela:ipac2021-thpab272,
author = {D. Gavela and I. Moya and I. Podadera and F. Scantamburlo and F. Toral},
title = {{Validation of Two Re-Buncher Cavities under High Beam Loading for LIPAc}},
booktitle = {Proc. IPAC'21},
pages = {4343--4345},
eid = {THPAB272},
language = {english},
keywords = {cavity, LLRF, beam-loading, operation, MEBT},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-THPAB272},
url = {https://jacow.org/ipac2021/papers/thpab272.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-THPAB272},
abstract = {{Two re-buncher cavities were installed at the Medium Energy Beam Transport line of the LIPAc accelerator, presently being commissioned at Rokkasho (Japan). They are IH-type cavities with five gaps providing an effective voltage of 350 kV at 175 MHz for a nominal operation of 125 mA CW deuterons at 5 MeV. After full conditioning and beamline integration in Europe, the cavities were installed in the accelerator with special care given to the alignment with respect to the rest of the components. The RF line, cooling circuits, and instrumentation were also mounted. The cavities were operated with an FPGA-based LLRF system. A re-conditioning of the cavities was performed in the first place, followed by tests with a pulsed beam with increasing currents. A maximum pulsed beam current of 100 mA was reached while operating the buncher cavities, under which they reached voltages up to 340 kV and 260 kV respectively. As expected, the beam loading was significant, leading to a series of difficulties and required strategies for a good operation that are discussed in this paper. The effect on the beam dynamics, measured by beam position monitors downstream of the bunchers is also discussed.}},
}