Speaker
Description
To mitigate beam instabilities associated with low magnetic fields, the Rapid Cycling Synchrotron (RCS) for EIC has been redesigned to operate with a higher injection energy of 750 MeV, accepting only one bunch at a time and accelerating it immediately to collision energy. As a result, the electron pre-injector must also be updated to supply an appropriately matched beam. In the latest pre-injector concept, the extraction energy has been increased to meet the new RCS requirement, and a dedicated Beam Accumulator Ring (BAR) has been added to provide the required bunch merging. To maintain comparable cost while meeting performance goals, the pre-injector design adopts Wien filters for spin rotation, an L-band capture linac to preserve polarization, a reduced bunch charge that eliminates the need for a stretch section, and a high-gradient S-band linac. This proceeding presents the updated EIC pre-injector concept along with supporting design studies and simulation results.
Funding Agency
Work is supported by Brookhaven Science Associates, LLC under DE-SC0012704 with the U.S. Department of Energy.
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