APS-U LATTICE DESIGN FOR OFF-AXIS ACCUMULATION

Conference · Sun Jun 25 04:00:00 EDT 2017

DOI:https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB14· OSTI ID:1389067

Sun, Yipeng; Borland, M.; Lindberg, R.; Sajaev, V.

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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE Office of Science - Office of Basic Energy Sciences; Argonne National Laboratory - Advanced Photon Source
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1389067
• Country of Publication: United States
• Language: English

Related Subjects

APS-U
APS-U LATTICE DESIGN
DESIGN FOR OFF-AXIS ACCUMULATION∗