Berendse Fred, Owens Scott M, Serlemitsos Peter J, Tueller Jack, Chan Kai-Wing, Soong Yang, Krimm Hans, Baumgartner Wayne H, Ogasaka Yasushi, Tamura Keisuke, Okajima Takashi, Tawara Yuzuru, Yamashita Koujun, Misaki Kazutami, Kunieda Hideyo
NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
Appl Opt. 2003 Apr 1;42(10):1856-66. doi: 10.1364/ao.42.001856.
The International Focusing Optics Collaboration for microCrab Sensitivity (InFOCmicroS) balloonborne hard x-ray telescope incorporates graded Pt/C multilayers replicated onto segmented Al foils to obtain the significant effective area at energies previously inaccessible to x-ray optics. Reflectivity measurements of individual foils demonstrate our capability to produce a mass quantity of multilayered foils with a rms roughness of 0.5 nm. The effective area of the completed mirror is 78 and 22 cm2 at 20 and 40 keV, respectively. The measured half-power diameter is 2.0 +/- 0.6 are min (90% confidence). The successful completion of this mirror demonstrates its applicability to future x-ray telescopes such as Constellation-X.
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