Spin manipulating stored $1.85\text{ }\text{ }\mathrm{GeV}/c$ vector and tensor polarized spin-1 bosons

Open Access

Spin manipulating stored $1.85 GeV / c$ vector and tensor polarized spin-1 bosons

V. S. Morozov, A. D. Krisch, M. A. Leonova, R. S. Raymond, D. W. Sivers, V. K. Wong, R. Gebel, A. Lehrach, B. Lorentz, R. Maier, D. Prasuhn, A. Schnase, H. Stockhorst, D. Eversheim, F. Hinterberger, H. Rohdjeß, K. Ulbrich, and K. Yonehara

Phys. Rev. ST Accel. Beams 8, 061001 – Published 3 June 2005

Abstract

We recently studied the spin manipulation of $1.85 GeV / c$ vertically polarized deuterons stored in the COSY cooler synchrotron. We adiabatically swept an rf dipole’s frequency through an rf-induced spin resonance and observed its effect on the deuterons’ vector and tensor polarizations. After optimizing the resonance crossing rate and maximizing the rf dipole’s voltage, we measured spin-flip efficiencies of $97 \pm 1 %$ and $98.5 \pm 0.3 %$ in two separate runs. We also confirmed at higher energy the striking behavior of the spin-1 tensor polarization recently found at IUCF.

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Received 1 February 2005

DOI:https://doi.org/10.1103/PhysRevSTAB.8.061001

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