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@inproceedings{kallestrup:ipac2021-mopab020,
author = {J. Kallestrup and M. Aiba},
title = {{Improvements to the SLS Booster Synchrotron Performance Towards SLS 2.0}},
booktitle = {Proc. IPAC'21},
pages = {103--106},
eid = {MOPAB020},
language = {english},
keywords = {booster, emittance, sextupole, coupling, injection},
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-MOPAB020},
url = {https://jacow.org/ipac2021/papers/mopab020.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-MOPAB020},
abstract = {{The Swiss Light Source (SLS) storage ring will undergo a major upgrade to a multi-bend achromat lattice. The existing injector complex will be reused with few modifications. However, the SLS booster synchrotron has not been studied since the initial commissioning in years 2000-2001. We plan to apply an emittance exchange in the booster to lower the horizontal emittance, which is a critial parameter for the injection. Here, we present improvements to the SLS booster as a preparation for SLS 2.0 upgrade project. The vertical beam size is decreased by 50\% by the use of vertical orbit correctors without beam position monitors, leading also to suppression of vertical dispersion and a factor 10 reduction of the transverse coupling coefficient. The emittance exchange reflected these improvements in the horizontal emittance, achieving a factor of 9-10 reduction. Lastly, a fast head-tail instability limiting the injection rate into the storage ring is discovered and subsequently suppressed by correcting the chromaticities.}},
}