The design and performance of the FNAL high-energy polarized-beam facility

D. P. Grosnick, D. A. Hill, M. R. Laghai, D. Lopiano, Y. Ohashi, T. Shima, H. Spinka, R. W. Stanek, D. G. Underwood, A. Yokosawa, F. Lehar, A. de Lesquen, L. van Rossum, D. C. Carey, R. N. Coleman, J. D. Cossairt, A. L. Read, R. Schailey, A. A. Derevschikov, Yu A. MatulenkoA. P. Meschanin, S. B. Nurushev, R. A. Rzaev, V. L. Solovyanov, A. N. Vasiliev, N. Akchurin, Y. Onel, K. Imai, S. Makino, A. Masaike, K. Miyake, T. Nagamine, N. Tamura, T. Yoshida, R. Takashima, F. Takeutchi, T. Maki, K. Kuroda, A. Michalowicz, G. Shapiro, N. Tanaka, G. Salvato, A. Villari, M. Gazzaly, F. C. Luehring, D. H. Miller, M. D. Corcoran, F. Nessi-Tedaldi, M. Nessi, C. Nguyen, G. C. Phillips, J. B. Roberts, J. L. White, G. Pauletta, R. Birsa, F. Bradamante, S. Dalla Torre-Colautti, M. Georgi, A. Martin, A. Penzo, P. Schiavon, A. Zanetti

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54 Scopus citations


A new polarized-proton and -antiproton beam with 185 GeV/c momentum has been built at Fermilab. The design uses the parity-nonconserving decays of lambda and antilambda hyperons to produce polarized protons and antiprotons, respectively, a beam-transport system that minimizes depolarization effects, and a set of twelve dipole magnets that rotate the beam-particle spin direction. A beam-tagging system determines the momentum and polarization of individual beam particles. This allows a selection of particles in definite intervals of momentum and polarization. Measurements performed by two different polarimeters showed that the beam is polarized and the determination of polarization by beam-particle tagging is verified. A new measurement of the analyzing power of large-xF π0 production may lead to another beam polarimeter.

Original languageEnglish
Pages (from-to)269-292
Number of pages24
JournalNuclear Inst. and Methods in Physics Research, A
Issue number2-3
StatePublished - May 10 1990


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