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Title: APS-U LATTICE DESIGN FOR OFF-AXIS ACCUMULATION

Abstract

A 67-pm hybrid-seven-bend achromat (H7BA) lattice is being proposed for a future Advanced Photon Source (APS) multi-bend-achromat (MBA) upgrade project. This lattice design pushes for smaller emittance and requires use of a swap-out (on-axis) injection scheme due to limited dynamic acceptance. Alternate lattice design work has also been performed for the APS upgrade to achieve better beam dynamics performance than the nominal APS MBA lattice, in order to allow off-axis accumulation. Two such alternate H7BA lattice designs, which target a still-low emittance of 90 pm, are discussed in detail in this paper. Although the single-particle-dynamics performance is good, simulations of collective effects indicate that surprising difficulty would be expected accumulating high single-bunch charge in this lattice. The brightness of the 90-pm lattice is also a factor of two lower than the 67-pm H7BA lattice.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Argonne National Laboratory - Advanced Photon Source
OSTI Identifier:
1389067
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 2016 North American Particle Accelerator Conference, 10/09/16 - 10/14/16, Chicago, IL, US
Country of Publication:
United States
Language:
English
Subject:
APS-U; APS-U LATTICE DESIGN; DESIGN FOR OFF-AXIS ACCUMULATION∗

Citation Formats

Sun, Yipeng, Borland, M., Lindberg, R., and Sajaev, V. APS-U LATTICE DESIGN FOR OFF-AXIS ACCUMULATION. United States: N. p., 2017. Web. doi:10.18429.
Sun, Yipeng, Borland, M., Lindberg, R., & Sajaev, V. APS-U LATTICE DESIGN FOR OFF-AXIS ACCUMULATION. United States. doi:10.18429.
Sun, Yipeng, Borland, M., Lindberg, R., and Sajaev, V. Sun . "APS-U LATTICE DESIGN FOR OFF-AXIS ACCUMULATION". United States. doi:10.18429. https://www.osti.gov/servlets/purl/1389067.
@article{osti_1389067,
title = {APS-U LATTICE DESIGN FOR OFF-AXIS ACCUMULATION},
author = {Sun, Yipeng and Borland, M. and Lindberg, R. and Sajaev, V.},
abstractNote = {A 67-pm hybrid-seven-bend achromat (H7BA) lattice is being proposed for a future Advanced Photon Source (APS) multi-bend-achromat (MBA) upgrade project. This lattice design pushes for smaller emittance and requires use of a swap-out (on-axis) injection scheme due to limited dynamic acceptance. Alternate lattice design work has also been performed for the APS upgrade to achieve better beam dynamics performance than the nominal APS MBA lattice, in order to allow off-axis accumulation. Two such alternate H7BA lattice designs, which target a still-low emittance of 90 pm, are discussed in detail in this paper. Although the single-particle-dynamics performance is good, simulations of collective effects indicate that surprising difficulty would be expected accumulating high single-bunch charge in this lattice. The brightness of the 90-pm lattice is also a factor of two lower than the 67-pm H7BA lattice.},
doi = {10.18429},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jun 25 00:00:00 EDT 2017},
month = {Sun Jun 25 00:00:00 EDT 2017}
}

Conference:
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