simulation of a simple wolter telescope of type i by geant4 for some widely used materials

At the present work, the reflection of x-rays from surfaces composed of silicon, gold, iridium, and nickel is simulated in the range of e ≤ 5 kev energy for the two cases, which includes raw mirror surfaces and a typical wolter-i optics-based x-ray telescope. we used geant4 and a proper optical extension to use geant4 as a generalpurpose x-ray tracing package. the reflectivity of the materials and the efficiency of the telescope for the materials have been obtained as a function of energy. except for silicon, the efficiencies are close to each other for the materials. of course, we generally see a larger value for nickel. due to the importance of wolter-i optics in the simulation of x-ray telescopes and enhancement of the sensitivity of x-ray telescopes by increasing the reflectivity, the results of the present study have particular use in the manufacturing process of an x-ray telescope.