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@InProceedings{mulvany:napac2019-tupls11,
author = {O.K. Mulvany and B. Billett and B. Brajuskovic and J.A. Carter and A. McElderry and K.J. Wakefield},
title = {{NEG-Coated Copper Vacuum Chambers for the APS-Upgrade Storage Ring Vacuum System}},
booktitle = {Proc. NAPAC'19},
pages = {477--479},
paper = {TUPLS11},
language = {english},
keywords = {vacuum, storage-ring, photon, radiation, operation},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-TUPLS11},
url = {http://jacow.org/napac2019/papers/tupls11.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-TUPLS11},
abstract = {The APS-Upgrade (APS-U) storage ring features a diverse group of vacuum chambers including seven distinctive, non-evaporable getter (NEG)-coated copper vacuum chambers per each of the 40 sectors. These chambers feature a 22-millimeter diameter aperture along the electron-beam path, with two vacuum chambers permitting photon extraction through a keyhole-shaped extension to this aperture. The chambers range from 0.3-meters to 1.7-meters in length and fit within the narrow envelope of quadrupole and sextupole magnets. Six of the seven copper vacuum chambers intercept significant heat loads from synchrotron radiation; five of these designs are fabricated entirely from OFS copper extrusions and are equipped with a compact Glidcop® photon absorber. A hybrid vacuum chamber, fabricated from OFS copper extrusion and a copper chromium zirconium (CuCrZr) keyhole transition, also intercepts synchrotron radiation. The seventh vacuum chamber design features a keyhole aperture across its length and is entirely fabricated from CuCrZr. This paper details the careful balance of vacuum chamber functionality, manufacturability, and the overall design process followed to achieve the final designs.},
}