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@inproceedings{abliz:ipac2021-thpab050,
author = {M. Abliz and M. Borland and J.H. Grimmer and J.S. Kerby and M. Ramanathan and A. Xiao},
title = {{Compact Hybrid Planar Permanent Magnet Undulator Design for the APS Upgrade}},
booktitle = {Proc. IPAC'21},
pages = {3859--3861},
eid = {THPAB050},
language = {english},
keywords = {undulator, ECR, lattice, photon, 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-THPAB050},
url = {https://jacow.org/ipac2021/papers/thpab050.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-THPAB050},
abstract = {{We report on the successful design of a compact 28-mm period hybrid planar permanent magnet (HPPM) undulator for the Advanced Photon Source Upgrade (APS-U) project. The design produces a peak field of 9750 G at a gap of 8.5 mm, with a pole width reduced to 35 mm as compared to the planar undulators currently in use at the Advanced Photon Source. The design includes a detailed investigation into the origin of the HPPM undulator demagnetization. We report on a finding of an optimization method that reduces the demagnetization field and increases the field at the gap center of the design. It includes an optimization of the pole edges to increase the field and decrease roll-off in the transverse direction. Further design optimizations include analyses of the mechanical assembly tolerances and comparison with the original design before building the device. Beam physics analyses included kick-map analysis, dynamic acceptance (DA), local momentum acceptance (LMA), and Touschek lifetime of this design were performed with the 42-pm lattice of the APS-U. Detailed magnetic design, effective field, field roll-off, magnetic force, and tracking results are reported.}},
}