Control of momentum-compaction factor in synchrotron with "resonant" lattice

In the construction of different types of synchrotrons we are often restricted in our choice of the momentum compaction factor, which must be kept low enough or negative to satisfy many conditions of beam stability. Some accelerators must have the dispersion-free straight sections desired for RF stations, Siberian Snakes, etc. The dynamic aperture in the presence of chromaticity-correcting sextupoles should be sufficiently large. The theory of momentum compaction factor control is discussed in this article.