Advantages of lattices with a variable phase slip factor

In high luminosity colliders such as B-Factories, it is useful to have control over the phase slip factor. Being able to adjust the phase slip factor and the RF peak voltage allows independent tuning of the synchrotron tune and the beam's bunch length. This adds flexibility to the machine making it possible to find an operating point which is cheaper while simultaneously avoiding synchro-betatron resonances. In addition, using arc cells which have inverted bending provides a small phase slip factor while simultaneously having emittance and large dispersion, all of which is desirable for B-Factories