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Title: Overview of Lattice Design and Evaluation for the APS Upgrade

The Advanced Photon Source (APS) is a 7-GeV synchrotron light source that has been in operation since 1996. Since that time, the effective emittance has been decreased from 8 nm to 3.1 nm, which is very competitive for a 3rd-generation light source. However, newer facilities such as PETRA-III, NSLS-II, and MAX-IV are pushing the emittance to significantly smaller values. MAX-IV in particular has set the current benchmark with an emittance of about 300 pm at 3 GeV. This was accomplished by use of a multi-bend achromat lattice, which takes advantage of the 1/M3 scaling of the emittance with respect to the number of dipoles M. In order to ensure that our facility remains competitive, APS is pursuing a major upgrade, which involves replacement of the existing double-bend lattice with a seven-bend achromat lattice, promising a 40-fold reduction in emittance. This paper describes the process of developing and evaluating candidate lattice designs. Two candidate 6-GeV lattices are described: one providing a natural emittance of 67 pm and the other providing 41 pm. Our analysis includes single-particle dynamics as well as single- and multi-bunch collective effects.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
ICFA Beam Dynamics Newsletter
Additional Journal Information:
Journal Volume: 71; Journal ID: ISSN 2079-0104
Publisher:
International Committee for Future Accelerators
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
07 ISOTOPE AND RADIATION SOURCES
OSTI Identifier:
1399895

Borland, M., Emery, L., Lindberg, R., Sajaev, V., Sun, Y. -P., and Xiao, A.. Overview of Lattice Design and Evaluation for the APS Upgrade. United States: N. p., Web.
Borland, M., Emery, L., Lindberg, R., Sajaev, V., Sun, Y. -P., & Xiao, A.. Overview of Lattice Design and Evaluation for the APS Upgrade. United States.
Borland, M., Emery, L., Lindberg, R., Sajaev, V., Sun, Y. -P., and Xiao, A.. 2017. "Overview of Lattice Design and Evaluation for the APS Upgrade". United States. doi:. https://www.osti.gov/servlets/purl/1399895.
@article{osti_1399895,
title = {Overview of Lattice Design and Evaluation for the APS Upgrade},
author = {Borland, M. and Emery, L. and Lindberg, R. and Sajaev, V. and Sun, Y. -P. and Xiao, A.},
abstractNote = {The Advanced Photon Source (APS) is a 7-GeV synchrotron light source that has been in operation since 1996. Since that time, the effective emittance has been decreased from 8 nm to 3.1 nm, which is very competitive for a 3rd-generation light source. However, newer facilities such as PETRA-III, NSLS-II, and MAX-IV are pushing the emittance to significantly smaller values. MAX-IV in particular has set the current benchmark with an emittance of about 300 pm at 3 GeV. This was accomplished by use of a multi-bend achromat lattice, which takes advantage of the 1/M3 scaling of the emittance with respect to the number of dipoles M. In order to ensure that our facility remains competitive, APS is pursuing a major upgrade, which involves replacement of the existing double-bend lattice with a seven-bend achromat lattice, promising a 40-fold reduction in emittance. This paper describes the process of developing and evaluating candidate lattice designs. Two candidate 6-GeV lattices are described: one providing a natural emittance of 67 pm and the other providing 41 pm. Our analysis includes single-particle dynamics as well as single- and multi-bunch collective effects.},
doi = {},
journal = {ICFA Beam Dynamics Newsletter},
number = ,
volume = 71,
place = {United States},
year = {2017},
month = {8}
}