  We present a novel method for minimizing the effects of radiative
depolarization in electron storage rings by use of vertical orbit bumps in the
arcs. Electron polarization is directly characterized by the RMS of the
so-called spin orbit coupling function in the bends. In the Electron Storage
Ring (ESR) of the Electron-Ion Collider (EIC), as was the case in HERA, this
function is excited by the spin rotators. Individual vertical corrector coils
in the arcs can have varying impacts on this function globally. In this method,
we use a singular value decomposition of the response matrix of the spin-orbit
coupling function with each coil to define a minimal number of most effective
groups of coils, motivating the name "Best Adjustment Groups for ELectron Spin"
(BAGELS) method. The BAGELS method can be used to minimize the depolarizing
effects in an ideal lattice, and to obtain fine-tuning knobs to restore the
minimization in rings with realistic closed orbit distortions. Furthermore, the
least effective groups can instead be chosen for other applications where no
impact on polarization is desirable, e.g. global coupling compensation or
vertical emittance creation. Application of the BAGELS method has significantly
increased the polarization in simulations of the 18 GeV ESR, beyond achievable
with conventional methods.
