Image Evaluation of the Photophysics Beamline at Indus-1 Synchrotron Source by Ray Tracing

Abstract

The Photophysics beamline at INDUS-1 synchrotron source will be used for carlying out various types of experiments in atomic, molecular and condensed matter physics. In this beamline a toroidal mirror focuses the light originating from the tangent point of the synchrotron source onto the horizontal entrance slit of a one meter Seya-Namioka inonochromator. The dispersed light emerging from the exit slit of the monochromator is focused by a second toroidal mirror at the sample under study. We have extensively used the software package “SHADOW” for raytracing work and plotted the spot diagrams at the entrance slit, exit slit and the sample position. For ray tracing purpose we have first used the optimised layout of the beamline. In order to accommodate off-the-shelf optical components, the optical layout was modified by changing the distance between the second toroidal mirror and the sample position. We have plotted the spot diagram at the sample position for various distances between the second toroidal mirror and the sample position. Finally, we have established the most suitable value of the second toroidal mirror to the sample position distance for which the spot size at the sample position is minimum.