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Description
The Hefei Advanced Light Facility (HALF) is a fourth generation synchrotron light source under construction, centered on a 2.2 GeV diffraction limited storage ring (DLSR) with a design natural emittance below 86 pm·rad. The storage ring has a circumference of nearly 480 m and contains 880 magnets in 20 lattice cells, including longitudinal gradient bends (LGB), reverse bends (RB), quadrupoles (Q), sextupoles (S), octupoles (O), and all corrector magnets (CR). As of early 2026, all magnet types except the octupoles had completed series production and factory magnetic measurements. This paper presents the physical design methodology and key magnetic measurement results of the HALF storage ring magnets, and also outlines ongoing studies on Preisach hysteresis modeling and on magnetic crosstalk in selected compact magnet assemblies through three dimensional simulations and stretched wire measurements.
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