[en] The results of acceleration simulations for a sample LAMPF II machine are presented. The momentum dispersion is nonzero at the RF cavities. Destructive betatron-synchrotron coupling effects are observed for nu/sub x/ +- nu/sub s/ = 10 and when two RF cavities are used to perform the acceleration. The coupling effects disappear when the number of equally spaced cavities is increased to six while maintaining the same net RF voltage/turn. Further studies are presented that show the effects of turning off one cavity while maintaining the same net RF voltage/turn for both 6- and 15-cavity machines