Physical Review Special Topics. Accelerators and Beams (May 2006)

Determination of deuteron beam polarizations at COSY

  • D. Chiladze,
  • A. Kacharava,
  • F. Rathmann,
  • C. Wilkin,
  • S. Barsov,
  • J. Carbonell,
  • S. Dymov,
  • R. Engels,
  • P. D. Eversheim,
  • O. Felden,
  • R. Gebel,
  • V. Glagolev,
  • K. Grigoriev,
  • D. Gusev,
  • M. Hartmann,
  • F. Hinterberger,
  • V. Hejny,
  • A. Khoukaz,
  • I. Keshelashvili,
  • H. R. Koch,
  • V. Komarov,
  • P. Kulessa,
  • A. Kulikov,
  • A. Lehrach,
  • B. Lorentz,
  • G. Macharashvili,
  • R. Maier,
  • Y. Maeda,
  • R. Menke,
  • T. Mersmann,
  • S. Merzliakov,
  • M. Mikirtytchiants,
  • S. Mikirtytchiants,
  • A. Mussgiller,
  • M. Nioradze,
  • H. Ohm,
  • D. Prasuhn,
  • H. Rohdjeß,
  • R. Schleichert,
  • H. Seyfarth,
  • E. Steffens,
  • H. J. Stein,
  • H. Ströher,
  • S. Trusov,
  • K. Ulbrich,
  • Yu. Uzikov,
  • A. Wrońska,
  • S. Yaschenko

DOI
https://doi.org/10.1103/PhysRevSTAB.9.050101
Journal volume & issue
Vol. 9, no. 5
p. 050101

Abstract

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The vector (P_{z}) and tensor (P_{zz}) polarizations of a deuteron beam have been measured using elastic deuteron–carbon scattering at 75.6 MeV and deuteron-proton scattering at 270 MeV. After acceleration to 1170 MeV inside the COSY storage ring, the polarizations of the deuterons were remeasured by studying the analyzing powers of a variety of nuclear reactions. For this purpose a hydrogen cluster target was employed at the ANKE magnetic spectrometer, which is situated at an internal target position in the ring. The overall precisions obtained were about 4% for both P_{z} and P_{zz}. Though all the measurements were consistent with the absence of depolarization during acceleration, only an upper limit of about 6% could be placed on such an effect.