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Polarizing a stored proton beam by spin flip?
Institut für Kernphysik, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany. (PAX collaboration)
Università di Ferrara and INFN, 44100 Ferrara, Italy.
St. Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia.
Institut für Kernphysik, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
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2009 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 674, no 4-5, 269-275 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Elsevier B.V. , 2009. Vol. 674, no 4-5, 269-275 p.
Keyword [en]
Polarized beams, Storage rings, Electron–proton scattering, Antiprotons
National Category
Subatomic Physics Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-38604DOI: doi:10.1016/j.physletb.2009.03.037ISI: 000265622500005OAI: oai:DiVA.org:su-38604DiVA: diva2:311238
Projects
PAX
Available from: 2010-04-20 Created: 2010-04-20 Last updated: 2017-12-12Bibliographically approved

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