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@inproceedings{qian:ipac2021-wepab130,
author = {M.F. Qian and R.J. Dejus and Y. Piao and I. Vasserman and J.Z. Xu},
title = {{Experience with Algorithm-Guided Tuning of APS-U Undulators}},
booktitle = {Proc. IPAC'21},
pages = {2915--2917},
eid = {WEPAB130},
language = {english},
keywords = {undulator, radiation, MMI, electron, permanent-magnet},
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-WEPAB130},
url = {https://jacow.org/ipac2021/papers/wepab130.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB130},
abstract = {{The Advanced Photon Source (APS) is undergoing a major upgrade to its storage ring. The APS Upgrade (APS-U) project plans to build over 40 new hybrid permanent magnet undulators (HPMUs) and rebuild over 20 existing HPMUs. To meet the APS-U undulator requirements, the quality of the undulator magnetic field needs to be fine-tuned to the specifications. The traditional methods that depend on the tuning specialist experience are not desirable for tuning large quantities of undulators. We developed algorithms that automate the tuning of permanent magnet undulators. For tuning of the undulator trajectory and phase, the algorithms optimize the tuning parameters with differential evolution-based global optimization. The algorithms have been successfully applied to over 18 APS HPMUs. The results and experiences of the tuning are reported in detail.}},
}