Overcoming intrinsic and synchrotron depolarizing resonances with a Siberian snake

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; B. von Przewoski; E. D. Courant; S. Y. Lee; L. G. Ratner; A. D. Krisch; R. S. Raymond; T. Roser; J. A. Stewart; B. Vuaridel

doi:10.1103/PhysRevLett.64.2779

Overcoming intrinsic and synchrotron depolarizing resonances with a Siberian snake

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, B. von Przewoski, E. D. Courant, S. Y. Lee, L. G. Ratner, A. D. Krisch, R. S. Raymond, T. Roser, J. A. Stewart, and B. Vuaridel

Phys. Rev. Lett. 64, 2779 – Published 4 June 1990

Abstract

We overcame the strong Gγ=-3+ $ν_{y}$ intrinsic depolarizing resonance using a Siberian snake acting on a stored beam of 177-MeV polarized protons at the Indiana University Cooler Ring. We also saw the first evidence for a synchrotron depolarizing resonance in a proton ring. Two synchrotron resonances were studied by varying the rf accelerating voltage and the imperfection field at 104 MeV. The Siberian snake also overcame these synchrotron depolarizing resonances.