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Determination of deuteron beam polarizations at COSY

D. Chiladze1,2,*, A. Kacharava3,2, F. Rathmann1, C. Wilkin4, S. Barsov5, J. Carbonell6, S. Dymov7, R. Engels1, P. D. Eversheim8 et al.

O. Felden1, R. Gebel1, V. Glagolev9, K. Grigoriev1,5, D. Gusev7, M. Hartmann1, F. Hinterberger8, V. Hejny1, A. Khoukaz10, I. Keshelashvili1,2, H. R. Koch1, V. Komarov7, P. Kulessa1,11, A. Kulikov7, A. Lehrach1, B. Lorentz1, G. Macharashvili7,2, R. Maier1, Y. Maeda12, R. Menke10, T. Mersmann10, S. Merzliakov1,7, M. Mikirtytchiants1,5, S. Mikirtytchiants5, A. Mussgiller1, M. Nioradze2, H. Ohm1, D. Prasuhn1, H. Rohdjeß8, R. Schleichert1, H. Seyfarth1, E. Steffens3, H. J. Stein1, H. Ströher1, S. Trusov13,7, K. Ulbrich8, Yu. Uzikov7, A. Wrońska1,11, and S. Yaschenko3,7

  • 1Institut für Kernphysik, Forschungzentrum Jülich, 52428 Jülich, Germany
  • 2High Energy Physics Institute, Tbilisi State University, 0186 Tbilisi, Georgia
  • 3Physikalisches Institut II, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
  • 4Physics and Astronomy Department, UCL, London WC1E 6BT, United Kingdom
  • 5High Energy Physics Department, Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia
  • 6Laboratoire de Physique Subatomique et de Cosmologie, 38026 Grenoble Cedex, France
  • 7Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, 141980 Dubna, Russia
  • 8Helmholtz Institut für Strahlen und Kernphysik, Universität Bonn, 53115 Bonn, Germany
  • 9Laboratory of High Energies, Joint Institute for Nuclear Research, 141980 Dubna, Russia
  • 10Institut für Kernphysik, Universität Münster, 48149 Münster, Germany
  • 11Institute of Nuclear Physics, 31342 Cracow, Poland
  • 12Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
  • 13Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, 01314 Dresden, Germany

  • *Electronic address: d.chiladze@fz-juelich.de
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Phys. Rev. ST Accel. Beams 9, 050101 – Published 16 May, 2006

DOI: https://doi.org/10.1103/PhysRevSTAB.9.050101

Abstract

The vector (Pz) and tensor (Pzz) 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 Pz and Pzz. 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.

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Phys. Rev. ST Accel. Beams 9, 050101– Published 16 May, 2006
  • Received 29 November 2005
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