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@inproceedings{albright:ipac2021-thpab183,
author = {S.C.P. Albright and F. Antoniou and F. Asvesta and H. Bartosik and C. Bracco and E. Renner},
title = {{New Longitudinal Beam Production Methods in the CERN Proton Synchrotron Booster}},
booktitle = {Proc. IPAC'21},
pages = {4130--4133},
eid = {THPAB183},
language = {english},
keywords = {space-charge, emittance, proton, resonance, cavity},
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-THPAB183},
url = {https://jacow.org/ipac2021/papers/thpab183.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-THPAB183},
abstract = {{As part of the LHC Injectors Upgrade (LIU) project, significant improvements were made to the CERN Proton Synchrotron Booster (PSB) during the 2019/2020 long shutdown, including a new Finemet-based wideband RF system, renovated longitudinal beam control, and a new magnetic cycle. To meet the requirements of the diverse experimental program, the PSB provides beams with intensities spanning three orders of magnitude and a large range of longitudinal emittances. To maximize the brightness, in particular for the LHC beams, the voltages at low energy are designed to reduce the impact of transverse space charge using a second RF harmonic in bunch lengthening mode. At high energies, the risk of longitudinal microwave instability is avoided by optimizing the longitudinal distribution to raise the instability threshold. RF phase noise is applied to provide controlled longitudinal emittance blow-up and to shape the longitudinal distribution. This paper discusses the design of the RF functions used to meet the beam specifications, whilst ensuring longitudinal stability.}},
}