Dispersion in the interaction point

S. Petracca, K. Hirata
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)  
In the presence of a dispersion at the interaction point, the betatron and the synchrotron oscillations affect each other. Just as linear effects, the beam-beam kick modifies the synchrotron tune, the bunch length, the energy spread etc, as well as the betatron tune and the Twiss parameters. Dispersion is no longer enough to describe the coupled dynamics and we needs two more parameters.
doi:10.1109/pac.1997.751006 fatcat:zjybnou3anb5bkj6e7o56csfgm