학술논문
Polarizing a stored proton beam by spin flip?
Document Type
Working Paper
Author
Oellers, D.; Barion, L.; Barsov, S.; Bechstedt, U.; Benati, P.; Bertelli, S.; Chiladze, D.; Ciullo, G.; Contalbrigo, M.; Dalpiaz, P. F.; Dietrich, J.; Dolfus, N.; Dymov, S.; Engels, R.; Erven, W.; Garishvili, A.; Gebel, R.; Goslawski, P.; Grigoryev, K.; Hadamek, H.; Kacharava, A.; Khoukaz, A.; Kulikov, A.; Langenberg, G.; Lehrach, A.; Lenisa, P.; Lomidze, N.; Lorentz, B.; Macharashvili, G.; Maier, R.; Martin, S.; Merzliakov, S.; Meshkov, I. N.; Meyer, H. O.; Mielke, M.; Mikirtychiants, M.; Mikirtychiants, S.; Nass, A.; Nekipelov, M.; Nikolaev, N. N.; Nioradze, M.; d'Orsaneo, G.; Papenbrock, M.; Prasuhn, D.; Rathmann, F.; Sarkadi, J.; Schleichert, R.; Smirnov, A.; Seyfarth, H.; Sowinski, J.; Spoelgen, D.; Stancari, G.; Stancari, M.; Statera, M.; Steffens, E.; Stein, H. J.; Stockhorst, H.; Straatmann, H.; Stroeher, H.; Tabidze, M.; Tagliente, G.; Engblom, P. Thoerngren; Trusov, S.; Vasilyev, A.; Weidemann, Chr.; Welsch, D.; Wieder, P.; Wuestner, P.; Zupranski, P.
Source
Phys.Lett.B674:269-275,2009
Subject
Language
Abstract
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.
Comment: 18 pages, 6 figures
Comment: 18 pages, 6 figures