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The Electron Ion Collider calls for polarized helion on polarized electron colli-
sions. These collisions will require 1.2×10^11 ions per bunch at 70% polarization.
Polarized helions will originate from the Electron Beam Ion Source and be in-
jected into the Booster at |Gγ| = 4.1932. The injected intensity from EBIS is
expected to be 2×10^11 ions with a polarization of 80%. Meeting the EIC physics
requirements will require maintaining both high efficiency and high polarization
transmission through the accelerator complex. In the Booster, an AC dipole
will be used to spin-flip across intrinsic resonances and harmonic corrections
will be used for imperfection resonances, up to extraction at |Gγ| = 10.5. In
the Alternating Gradient Synchrotron, due to the higher anomalous G-factor
of helions, the two partial snakes will have sufficient rotation to facilitate both
horizontal and vertical betatron tunes being placed inside the spin-tune gap up
to |Gγ| = 49.5. In the Hadron Storage Ring, 6 full snakes will be used to min-
imize polarization loss up to a maximum energy of |Gγ| = 820. At collisions,
longitudinal polarization will be available through use of helical spin rotators.
This paper provides a summary of polarized helion transmission from injection
to the Booster to top energy in the Hadron Storage Ring.
The work is supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
