Program BUNCH_BBI calculates the optics distortions and dynamic aperture limitations due to beam-beam interactions for any given input lattice. See, for example, Beam-Beam Interaction Studies at the Cornell Electron Storage Ring M.G.Billing and J.A.Crittenden December 20, 2006 Phys. Rev. ST Accel. Beams 9, 121001 (2006) ------------------------------------------------------ JAC 9/27/2012