Experimental verification of predicted oscillations near a spin resonance

ORAL

Abstract

The Chao matrix formalism allows analytic calculations of a beam's polarization behavior inside a spin resonance. We recently tested its prediction of polarization oscillations occurring in a stored beam of polarized particles near a spin resonance. Using a 1.85 GeV/c polarized deuteron beam stored in COSY, we swept a new rf solenoid's frequency rather rapidly through 400 Hz during 100 ms, while varying the distance between the sweep's end frequency and the central frequency of an rf-induced spin resonance. Our measurements of the deuteron's polarization near and inside the resonance agree with the Chao formalism's predicted oscillations.

*Supported by the German BMBF Science Ministry.

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Authors

  • V.S. Morozov

  • A.W. Chao

  • A.D. Krisch

  • M.A. Leonova

  • R.S. Raymond

  • D.W. Sivers

  • V.K. Wong

    • Univ. of Michigan, Ann Arbor, MI 48109-1040

  • A. Garishvili

  • R. Gebel

  • A. Lehrach

  • B. Lorentz

  • R. Maier

  • D. Prasuhn

  • H. Stockhorst

  • D. Welsch

    • Forschungszentrum J$\ddot{\mbox{u}}$lich, IKP, D-52425 J$\ddot{\mbox{u}}$lich

  • F. Hinterberger

  • K. Ulbrich

    • Helmholtz Inst., Univ. Bonn, D-53115 Bonn

  • A. Schnase

    • JAEA/J-PARC, Tokai-Mura, Ibaraki 319-1195, Japan

  • E.J. Stephenson

    • IUCF, Indiana Univ., Bloomington, IN 47408-0768

  • N.P.M. Brantjes

  • C.J.G. Onderwater

  • M. da Silva

    • Univ. of Groningen, the Netherlands