2023/10/30 by Minghao Song, Song, Minghao, Timur Shaftan +1
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Particle Accelerators and Free-Electron Lasers #Photocathodes and Microchannel Plates
paper · pdf · doi:10.48550/arxiv.2310.20010
openalex publication_date 2023/10/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Light sources worldwide have experienced rapid growth in the last decades, pushing towards higher brightness with lower emittance to meet growing demands from the user community. The quest for higher brightness motivates the development of low-emittance ring lattices. At this point, all fourth-generation storage ring light sources employ variations of the Multi-Bend Achromat (MBA) lattice. In this paper, we discuss an extension of this approach, known as Complex Bend\citeTimur2018techreport Achromat (CBA) lattice in relation to the future NSLS-II upgrade. A detailed approach for the lattice design will be described, and the developed lattice will be presented. The benefits of using a complex bend approach are demonstrated by achieving a small natural emittance of 23 pm at a beam energy of 3 GeV, straight sections of 8.4 m for long IDs acquiring a ratio of about 50% of the drift space with respect to the ring circumference, compact ring elements (complex bends) based on Permanent Magnets and a large-scale reduction in the number of power supplies. Our new approach provides an extension to the MBA concept for the next-generation light source lattice design.