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

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We describe a new polarized-proton and -antiproton beam with 185-GeV/c momentum in the Fermilab MP beam line which is currently operational. The design uses the parity-conserving decay of lambda and antilambda hyperons to produce polarized protons and antiprotons, respectively. A beam-transport system minimizes depolarization effects and uses a set of 12 dipole magnets that rotate the beam-particle spin direction. A beam-tagging system determines the momentum and polarization of individual beam particles, allowing a selection of particles in definite intervals at momentum and polarization. We measured polarization of the beam by using two types of polarimeters, which verified the determination of … continued below

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17 pages

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Tanaka, Nobuyuki. January 1, 1989.

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We describe a new polarized-proton and -antiproton beam with 185-GeV/c momentum in the Fermilab MP beam line which is currently operational. The design uses the parity-conserving decay of lambda and antilambda hyperons to produce polarized protons and antiprotons, respectively. A beam-transport system minimizes depolarization effects and uses a set of 12 dipole magnets that rotate the beam-particle spin direction. A beam-tagging system determines the momentum and polarization of individual beam particles, allowing a selection of particles in definite intervals at momentum and polarization. We measured polarization of the beam by using two types of polarimeters, which verified the determination of polarization by a beam-particle tagging system. Two of these processes are the inverse-Primakoff effect and the Coulomb-nuclear interference (CNI) in elastic proton-proton scattering. Another experiment measured the {pi}{sup 0} production asymmetry of large-x{sub F} values; this process may now be used as an on-line beam polarimeter. 9 refs., 9 figs.

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17 pages

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NTIS, PC A03/MF A01; OSTI; INIS; GPO Dep.

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  • 6. topical conference on physics with polarized beams on polarized targets, Spencer, IN (USA), 16-18 Oct 1989

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  • Other: DE90002409
  • Report No.: LA-UR-89-3600
  • Report No.: CONF-8910121--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5476357
  • Archival Resource Key: ark:/67531/metadc1090762

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  • January 1, 1989

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  • Feb. 10, 2018, 10:06 p.m.

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  • May 8, 2019, 12:08 p.m.

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Tanaka, Nobuyuki. The design and performance of the FNAL high-energy polarized beam facility, article, January 1, 1989; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1090762/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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