Combined finite elements and ray-tracing analysis for the optical system of JET-X x-ray telescope

摘要

Abstract: In order to evaluate the modifications of the optical performances of the JET-X telescope mirror shells (MS), due to manufacturing, integration tolerancing, gravity and thermal gradients, the following procedure has been used: (1) analysis of the deformed shape of the MS, by means of ADINA Finite Element code; (2) optical performance analysis by means of a Ray Tracing Code for Wolter I telescope (RTC), directly interfaced with the FE code output; with the possibility to add an elastic component to deformed shape obtained by FE analysis. For the different conditions analyzed, Half Power Radius (HPR), encircled energy and spot diagrams have been computed. Numerical analyses have been performed for the single mirror shells and for the whole Mirror Module (MM). In the paper the numerical models used are described, the main features of RTC and the relevant results are pointed out.!3