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Title: Residual polarization loss of protons accelerated with Siberian snakes
Plain: Even with special magnets that flip the spin each turn, protons accelerated to hundreds of GeV lose part of their polarization, for reasons not fully modeled.
Precise: RHIC accelerates polarized protons to $255\,\mathrm{GeV}$ with two full Siberian snakes, losing part of the injected polarization during acceleration through intrinsic and imperfection spin resonances. Determine the mechanism of the residual loss (higher-order snake resonances, overlap of intrinsic and imperfection resonances, spin-tune spread) and predict whether $N_s$ snakes preserve more than $70\,\mathrm{percent}$ polarization up to $275\,\mathrm{GeV}$ in an electron-ion collider hadron ring.
Settled by: Spin tracking that reproduces measured RHIC polarization versus energy and is then applied to the target lattice.
Kind: well-posed
Answer type: mechanism
References: (empty)
Literature status: open
Status note: (empty)
Posed since: (empty)