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PreprintCC BY-NC-ND 4.0arXiv

Design and optimization of the NSLS-II lattice with complex bend replacement

  • Minghao Song
  • Yoshiteru Hidaka
  • Bernard Kosciuk
  • Patrick N'Gotta
  • Sushil Sharma
  • Timur Shaftan
  • Guimei Wang
Open at sourcePDFDOICite

Abstract

The demand for brighter photon beams has driven the development of diffraction-limited storage rings with ultralow electron beam emittance. A complex bend (CB) lattice was recently proposed as an approach for the future NSLS-II upgrade. As a step toward this upgrade, NSLS-II plans to replace two existing electromagnetic dipoles with permanent-magnet CBs, providing the first experimental demonstration of the CB concept in a storage ring. This paper presents the linear optics design, nonlinear optimization, and machine error evaluation of the modified NSLS-II lattice. The optimized lattice provides sufficient dynamic and momentum apertures for off-axis injection and routine operation and can be corrected with the existing NSLS-II correction scheme. Scraper measurements near the planned CB installation location validate the beam aperture requirements used in the CB design.

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Cite

BibTeXRIS
BibTeX
@misc{song2026design,
  title = {{Design and optimization of the NSLS-II lattice with complex bend replacement}},
  author = {Minghao Song and Yoshiteru Hidaka and Bernard Kosciuk and Patrick N'Gotta and Sushil Sharma and Timur Shaftan and Guimei Wang},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.07854},
  eprint = {2609.07854},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.07854},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - Design and optimization of the NSLS-II lattice with complex bend replacement
AU  - Minghao Song
AU  - Yoshiteru Hidaka
AU  - Bernard Kosciuk
AU  - Patrick N'Gotta
AU  - Sushil Sharma
AU  - Timur Shaftan
AU  - Guimei Wang
PY  - 2026
DA  - 2026/09/07
PB  - arXiv
DO  - 10.48550/arxiv.2609.07854
UR  - https://arxiv.org/abs/2609.07854
AB  - The demand for brighter photon beams has driven the development of diffraction-limited storage rings with ultralow electron beam emittance. A complex bend (CB) lattice was recently proposed as an approach for the future NSLS-II upgrade. As a step toward this upgrade, NSLS-II plans to replace two existing electromagnetic dipoles with permanent-magnet CBs, providing the first experimental demonstration of the CB concept in a storage ring. This paper presents the linear optics design, nonlinear optimization, and machine error evaluation of the modified NSLS-II lattice. The optimized lattice provides sufficient dynamic and momentum apertures for off-axis injection and routine operation and can be corrected with the existing NSLS-II correction scheme. Scraper measurements near the planned CB installation location validate the beam aperture requirements used in the CB design.
ER  -