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Description
NSLS-II, a 3 GeV third-generation synchrotron light source at Brookhaven National Laboratory, was commissioned in 2014 with the ultimate performance goal of achieving 500 mA beam current and a vertical emittance at the 8 pm diffraction limit. Since commissioning, the facility has made steady progress, reaching routine 500 mA operation in 2025. Along this path, several challenges were encountered, including the insertion-devices induced coupling variations that depend on the ID gap. To achieve stable operation at the 8 pm vertical emittance, an improvement project is underway to install 15 new skew quadrupoles for precise coupling correction. This paper presents an overview of NSLS-II operational achievements, discusses key challenges encountered, and outlines ongoing improvement efforts and future plans.
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