Spin tune in the single resonance model with a pair of Siberian Snakes

Abstract

Snake ``resonances'' are classified in terms of the invariant spin field and the amplitude dependent spin tune. Exactly at snake ``resonance'' there is no continuous invariant spin field at most orbital amplitudes.

8 pages, 2 figures. Extended version of a paper for the 15th International Spin Physics Symposium, Brookhaven National Laboratory, U.S.A., 2002