Speaker
Description
The Electron Ion Collider (EIC) calls for collisions of longitudinally polarized
protons and helium-3 on electrons. The polarized hadron beams will be accel-
erated and stored in the Hadron Storage Ring (HSR). To achieve longitudinal
polarization at the interaction point (IP), spin rotators are placed on either side
of the IP at 35.28 and -61.35 mrad. Due to the asymmetry of the rotators, their
ramping and use will result in a shift of νs from 1/2. The HSR has six snakes
that can be used to compensate for the ∆νs. The planned storage energies for
protons are 41, 100, and 275 GeV, and for helium-3 are 41, 100, and 183 GeV/u.
The updated rotator currents at each of these energies is provided, in addition
to the ∆νs and the compensation requirements of the snakes.
Funding Agency
Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
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