MAQ Magazine n. 14 / September 2019
(Photograph courtesy of XMM-Newton SOC, VILSPA)
The four mirror shells (1,40,41,58) used during the EOBB measurements are shown in their assembled state. The picture was taken in the PANTER test chamber. The movable translators with which the mirror module could be moved in and out of the beam can also be seen. The entrance of the beam-pipe into the experiment-chamber is seen to the left of the mirror assembly.
(Image courtesy of the Max Planck Institute for Extraterrestrial Physics, 1998 calendar picture)
The picture shows the clipping of the mirror module of the European X-ray observatory XMM-Newton. One can recognize the 58 closely nested about 1 mm thick X-ray mirrors manufactured by a galvanic shaping process. The mirror systems were calibrated in the PANTER test facility at Neuried. The lower diagram shows the reflectivity of the single mirrors measured by using 8 keV X-rays.
The thickness of the mirror shells varies from ca. 0.5 mm (inner shells) to 1 mm (outer shells). The distance between the shells, i.e. the free aperture for incoming radiation onto each shell, ranges from ca. 1.8 mm (inner) to 4 mm (outer).
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