Polarizing mechanisms for stored and beams interacting with a polarized target.
The kinetics of the polarization buildup during the interaction of stored protons (antiprotons) with a polarized target is considered. It is demonstrated that for small scattering angles, when a projectile remains in the beam, the polarization buildup is completely due to the spin-flip transitions. The corresponding cross sections turn out to be negligibly small for a hydrogen gas target as well as for a pure electron target. For the latter, the filtering mechanism also does not provide a noticeable beam polarization.
Budker Institute of Nuclear Physics, 630090 Novosibirsk, Russia. a.i.milstein@inp.nsk.su
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Milstein
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Strakhovenko