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This paper presents the 2nd generation of the optical system for Rocket Experiment (REX2). This optical device is based on successful mission REX1. The purpose of REX2 is to verify X-ray optical system consisting of wide- field 2D X-ray Lobster-Eye (LE) optics with an uncooled Quad Timepix3 detector (512x512 px @ 55 um and spectrometer (active area 7 mm2, 145 eV @ 5.9 keV ). The 2D X-ray Lobster-Eye (LE) optics is a combination of two one-dimension LE modules with a focal length of up to 1 m and a FOV better than 4.0 x 4.0 deg. The proposed optical system has imaging capabilities (2.5 to 30 keV) and spectroscopy capabilities (0.2 to 10 keV). The optical system was recently tested in the X-ray vacuum chamber. The preliminary test results are presented and discussed in this paper.
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Ladislav Pina, Rene Hudec, Veronika Marsikova, Adolf Inneman, Vladimir Daniel, "X-ray testing of the multifoil optical system REX II for rocket experiment," Proc. SPIE 11776, EUV and X-ray Optics, Sources, and Instrumentation, 1177608 (18 April 2021); https://doi.org/10.1117/12.2593763