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Description
To preserve polarization in the Alternating Gradient Synchrotron (AGS), two
partial snakes are used to avoid both imperfection resonances and vertical in-
trinsic resonances. One of these partial snakes is superconducting and the other
is normal conducting, the cold and warm partial snakes. Simulations show that
adding an additional cold partial snake improves polarization transmission for
both polarized protons and polarized helions. In this configuration, the spin-
tune gap for protons is large enough to accommodate both Qx and Qy . For
polarized helions, the spin tune gap is large enough for both Qx and Qy to
be well separated but the additional cold-snake provides lossless transmission
across the very strong Gγ = 60 − νy can be achieved. This paper serves as an
investigation into extraction above 15 GeV/u which is needed to support all
snake precession axes of polarized helions in the Hadron Storage Ring.
Footnotes
Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
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