This title appears in the Scientific Report :
2010
Please use the identifier:
http://hdl.handle.net/2128/10383 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2009.03.037 in citations.
Polarizing a stored proton beam by spin flip?
Polarizing a stored proton beam by spin flip?
We discuss polarizing a proton beam in a storage ring, either by selective removal or by spin flip of the stored ions. Prompted by recent, conflicting calculations, we have carried out a measurement of the spin-flip cross section in low-energy electron-proton scattering. The experiment uses the cool...
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Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2009.03.037 in citations.
We discuss polarizing a proton beam in a storage ring, either by selective removal or by spin flip of the stored ions. Prompted by recent, conflicting calculations, we have carried out a measurement of the spin-flip cross section in low-energy electron-proton scattering. The experiment uses the cooling electron beam at COSY as an electron target. The measured cross sections are too small for making spin flip a viable tool in polarizing a stored beam. This invalidates a recent proposal to use co-moving polarized positrons to polarize a stored antiproton beam. (C) 2009 Elsevier B.V. All rights reserved. |