DETAILED RAY-TRACING CODE FOR CAPILLARY OPTICS

A description of a detailed ray-tracing code for capillary optics is g iven and a number of examples of the use of the program are discussed. The model uses numerically defined capillary shapes and is able to si mulate the behaviour of devices having shape distortions of various na ture, including bending of the capillary. Comparisons are made with pr eviously published capillary calculation models and with experimental results described in the literature. The use of the code is also demon strated for the optimization of conical capillary dimensions assuming extended x-ray sources. With respect to the modelling of realistic cap illary shapes, the beam transmission properties of an ellipsoidal devi ce are calculated, using the experimentally determined capillary profi le.