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RIS citation export for MOPC11: Discrete Photon Absorbers for the APS-Upgrade Storage Ring Vacuum System

TY  - CONF
AU  - Mulvany, O.K.
AU  - Billett, B.
AU  - Brajuskovic, B.
AU  - Carter, J.A.
AU  - McElderry, A.
AU  - Swanson, R.R.
ED  - Jaski, Yifei
ED  - Den Hartog, Patric
ED  - Jaje, Kelly
ED  - Schaa, Volker R.W.
TI  - Discrete Photon Absorbers for the APS-Upgrade Storage Ring Vacuum System
J2  - Proc. of MEDSI2020, Chicago, IL, USA, 24-29 July 2021
CY  - Chicago, IL, USA
T2  - Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation
T3  - 11
LA  - english
AB  - The Advanced Photon Source Upgrade storage ring arc vacuum system features a diverse set of photon beam-intercepting components, including five discrete photon absorbers and a series of small-aperture vacuum chambers that shadow downstream components. The discrete photon absorbers, typically fabricated from electron beam-welded GlidCop AL-15, are subject to heat loads ranging from approximately 170 to 3400 watts, with a peak power density up to approximately 610 W/mm2 at normal incidence. Four of the five photon absorber designs are housed in vacuum chambers, including three that are mounted to the antechambers of curved aluminum extrusion-based L-bend vacuum chambers and one that is mounted to a stainless steel vacuum-pumping cross. Furthermore, two of the photon absorbers that are mounted to L-bend vacuum chambers are equipped with position-adjustment mechanisms, which are necessitated by the challenging design and fabrication of the curved vacuum chambers. The fifth photon absorber, unlike the rest, is a brazed design that is integral in sealing the vacuum system and intercepts approximately 170 watts. Each photon absorber design was optimized with thermal-structural finite element analyses while ensuring functional and spatial requirements were met. Some of these requirements include meeting internal high-heat-load component design criteria, respecting challenging component interfaces and alignment requirements, and minimizing impedance effects. Furthermore, photon beam scattering effects called for the use of scattering shields on three designs to minimize potential heating of vacuum chambers. This paper details the careful balance of functionality and manufacturability, and the overall design process followed to achieve the final designs.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 75
EP  - 77
KW  - photon
KW  - vacuum
KW  - storage-ring
KW  - interface
KW  - electron
DA  - 2021/10
PY  - 2021
SN  - 2673-5520
SN  - 978-3-95450-229-5
DO  - doi:10.18429/JACoW-MEDSI2020-MOPC11
UR  - https://jacow.org/medsi2020/papers/mopc11.pdf
ER  -