WAVE-FRONT PROPAGATION - DESIGN CODE FOR SYNCHROTRON-RADIATION BEAM LINES

Third-generation synchrotron radiation light sources provide partially coherent radiation. Certain topics in the optical design of beam line s and monochromators can be studied with electric-field distributions only rather than with intensity distributions of the light source. The radiation characteristics of a dipole or an undulator can be represen ted by a two-dimensional complex-electric-field distribution at a dist ance of several meters from the insertion device center. A method is d escribed that transforms this field distribution through a complete be am line (consisting of mirrors and gratings) to the sample plane. Diff raction at apertures can be modeled and Stokes parameters can be evalu ated. The derivation of the equations was performed with the algebraic code REDUCE. A comparison with the brightness formalism is provided. (C) 1997 Optical Society of America.