Computational Method for the Dispersion, Betatron Functions and C.O.D. in Nonlinear Lattice

A computational method for the dispersion, betatron functions and the closed orbit distortion in the lattice with nonlinear elements is presented. We apply the method to the lattice with sextupole elements and with magnetic imperfections of KEK PHOTON FACTORY STORAGE RING (PF-RING), and present the numerical results.