Overview of Lattice Design and Evaluation for the APS Upgrade
Abstract
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:
-
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1399895
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article: 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
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 07 ISOTOPE AND RADIATION SOURCES
Citation Formats
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., 2017.
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. 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 = {},
url = {https://www.osti.gov/biblio/1399895},
journal = {ICFA Beam Dynamics Newsletter},
issn = {2079-0104},
number = ,
volume = 71,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}