Two identical Wolter type 1 mandrels, with 50 cm diameter and 8.4 meter focal length, to be used by NASA/MSFC for their Constellation-X mirror development program, have been produced and tested by Carl Zeiss. In August 1999, both mandrels have been delivered to MSFC.Key optical performance ofboth mandrels: -On-axis}IEW:<3.2arcsec -Micro-roughness: better than 0.30 nm RMS We will report about mandrels design, fabrication, test and verification oftheir Xray optical performance.
At the July 1 998 SPIE Conference, we reported about design and development as well as about fabrication, optical testing and integration of the grazing incidence ABRIXAS mirrors. In this paper we will describe the environmental and X-ray optical testing of the seven (7) flight mirror modules and we will report about their achieved performance.Each ABRIXAS mirror module contains 27 highly nested, thinwalled Wolter-1 mirror shells; the mirror shells are produced by the Nickel-electroforming technology.The ABRIXAS NMirror System is composed of the 7 mirror modules, the 7 thermal/optical baffles in front of the mirror modules, all mounted on the common support platform.We will report about assembly and tests of the ABRIXAS mirror system and its integration in the ABRIXAS satellite structure, induding final mechanical, electrical, and optical test.
ESA's XEUS x-ray telescope design asks for segmented Wolter I mirror plates with radii up to 5 m and a focal length of 50 m. The mirror plates shall have an excellent optical performance ( < 5arc sec HEW ). They shall be made by metal (e.g. Nickel) electroforming. This design approach requires highest quality segmented Wolter I mandrel plates, with an on-axis HEW < 2 arc sec and a micro-roughness better than 0.3 nm (r.m.s.). We will report about the novel design concept, fabrication approach and verification of the x-ray optical performance of the first XEUS demonstration mandrel.
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