“…The beam optics code OPA [7], written and maintained by one of the authors, is tailored to interactively design beam optical systems. Especially for the initial design phase, estimating the equilibrium beam properties from the optics of a non-periodic system, helps to guide the optimization; and this requires the evaluation of the radiation integrals, especially for intrinsically coupled lattices, such as Spiral-COSAMI [8].…”