Speaker
Description
The Electron-Ion Collider (EIC) Beam Accumulator Ring (BAR) is crucial for polarized electron charge accumulation prior to injection into the Rapid Cycling Synchrotron (RCS). The preliminary BAR lattice, based on the NSLS VUV ring, utilized a lattice with 4 Double-Bend Achromat (DBA) cells. This work details the optimization effort to transition to a more compact design with 2 Multi-Bend Achromat (MBA) cells.
The primary motivations for this lattice evolution are footprint and cost reduction. Specifically, the new MBA lattice minimizes the required building area, reduces the total number of quadrupoles and sextupoles, and simplifies the vacuum system, while strategically reusing existing VUV ring component designs to minimize new R&D. Furthermore, the optimization addresses a required adjustment in the RF frequency to a subharmonic of the RCS, simplifying synchronization. Detailed beam optics studies confirm the new 2-cell MBA lattice successfully maintains key performance requirements.
Funding Agency
This work was supported by Brookhaven Science Associates, LLC under Grant No. DE-SC0012704 with the U.S. Department of Energy
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