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9 September 2019 Simulating the effects of thermoelastic deformation on the THESEUS Soft X-ray Imager optics
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We present a ray tracing simulation of the Soft X-ray Imager (SXI) optics for the THESEUS observatory using the open-source McXtrace software package. THESEUS is a candidate mission within the Cosmic Vision programme of the European Space Agency and is designed to monitor high-energy transient events in the entire sky, therefore relying on fast slewing of the spacecraft. This capability will however impose large temperature variations and gradients across the optics which can cause thermoelastic deformation of the Soft X-ray Imager microchannel optics. The purpose of this study is to evaluate the impact on the point spread function (PSF) due to in-orbit temperature variation. Based on thermal analysis of the Soft X-ray Imager, perturbations to the ideal microchannel geometry are derived and provided as input to the ray tracer.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Svendsen, E. B. Knudsen, S. Blake, T. Oosterbroek, A. 'S Jegers, D. D. M. Ferreira, T. Prod'homme, B. Shortt, R. Willingale, and P. O'Brien "Simulating the effects of thermoelastic deformation on the THESEUS Soft X-ray Imager optics", Proc. SPIE 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX, 111191R (9 September 2019);


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