First test of the Siberian snake magnet arrangement to overcome depolarizing resonances in a circular accelerator

A. D. Krisch; S. R. Mane; R. S. Raymond; T. Roser; J. A. Stewart; K. M. Terwilliger; B. Vuaridel; J. E. Goodwin; H-O. Meyer; M. G. Minty; P. V. Pancella; R. E. Pollock; T. Rinckel; M. A. Ross; F. Sperisen; E. J. Stephenson; E. D. Courant; S. Y. Lee; L. G. Ratner

doi:10.1103/PhysRevLett.63.1137

First test of the Siberian snake magnet arrangement to overcome depolarizing resonances in a circular accelerator

A. D. Krisch, S. R. Mane, R. S. Raymond, T. Roser, J. A. Stewart, K. M. Terwilliger, B. Vuaridel, J. E. Goodwin, H-O. Meyer, M. G. Minty, P. V. Pancella, R. E. Pollock, T. Rinckel, M. A. Ross, F. Sperisen, E. J. Stephenson, E. D. Courant, S. Y. Lee, and L. G. Ratner

Phys. Rev. Lett. 63, 1137 – Published 11 September 1989

Abstract

We studied the Gγ=2 imperfection depolarizing resonance at 108 MeV, both with and without a Siberian snake, by varying the resonance strength while storing beams of 104- and 120-MeV polarized protons at the Indiana University Cooler Ring. We used a cylindrically symmetric polarimeter to simultaneously study the effect of a depolarizing resonance on both the vertical and radial components of the polarization. AT 104 MeV we found that the Siberian snake eliminated the effect of the nearby Gγ=2 depolarizing resonance.