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12 July 2023 The X-ray testing of Einstein Probe Wide-field X-ray Telescope Qualification Model at PANTER
Surangkhana Rukdee, Vadim Burwitz, Gisela Hartner, Thomas Müller, Thomas Schmidt, Andreas Langmeier, Peter Friedrich, Charlotte Feldman, Paul O'Brien, Richard Willingale, Chen Zhang, Zhixing Ling, Weiman Yuan
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Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 127773F (2023) https://doi.org/10.1117/12.2690354
Event: International Conference on Space Optics — ICSO 2022, 2022, Dubrovnik, Croatia
Abstract
Wide-field X-ray Telescope (WXT) is a survey instrument of Einstein Probe, a small-class mission dedicated to time-domain high-energy astrophysics to discover transients and monitor variable objects in the 0.5–4.0 keV X-rays. We aim to characterize the performance of Qualification Model (QM) of the Einstein Probe Wide-field X-ray Telescope (WXT) – to determine the half-energy width (HEW) on-axis and off-axis, and the energy-dependent efficiency. The WXT optics assembly, consisting of 36 Micro Pore Optic (MPO) chips divided into four 3x3 MPO sectors which focus onto separate detectors. The full characterization consists of the focus searches, focal plane mapping and effective area measurements at different energies: C-K, Cu-L, Ti-K, very low Energy band continuum (vlEbc), and low Energy band continuum (lEbc). Measurements were made using the TRoPIC detector (pnCCD), a prototype of the eROSITA camera. The focal plane mapping results show an expected slight degradation towards the furthest off-axis angles as well the known alignment imperfections of some of the MPOs. The effective area results of the Energy band continuum match well with the theoretical model. This work describes the X-ray testing of the WXT QM3 Qualification Model at the PANTER X-ray test facility of the Max-Planck Institute for extraterrestrial Physics in Germany. The test setup, measurements and results are presented.
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Surangkhana Rukdee, Vadim Burwitz, Gisela Hartner, Thomas Müller, Thomas Schmidt, Andreas Langmeier, Peter Friedrich, Charlotte Feldman, Paul O'Brien, Richard Willingale, Chen Zhang, Zhixing Ling, and Weiman Yuan "The X-ray testing of Einstein Probe Wide-field X-ray Telescope Qualification Model at PANTER", Proc. SPIE 12777, International Conference on Space Optics — ICSO 2022, 127773F (12 July 2023); https://doi.org/10.1117/12.2690354
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KEYWORDS
X-rays
Point spread functions
X-ray telescopes
Astronomical imaging
Reflection
Vacuum chambers
X-ray optics
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