28 November 2000 Development of a balloonborne hard x-ray telescope using multilayer supermirror
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We have been developing high throughput X-ray telescope for hard X-ray region (20 - 40 keV) using Pt/C multilayer supermirrors for balloon borne experiment launched in 2001 June. The Walter type I telescope consists of about 2,000 supermirrors coated on very thin (150 micrometer) aluminum foils. We started mass production of the supermirror reflectors. Two different method is used for fabrication process. One is multilayer deposition on the platinum replica foil, and the other is direct replication of supermirror. The performance of the supermirrors are measured in X-ray beam line in Nagoya University and synchrotron radiation facility SPring-8. We obtained 30% reflectivity at 30 keV, corresponding to 0.35 nm interfacial roughness by Debye-Waller factor. The performance of multilayer supermirrors indicate that we can achieve about 100 cm2 effective area for a telescope.
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Keisuke Tamura, Keisuke Tamura, Koujun Yamashita, Koujun Yamashita, Yuzuru Tawara, Yuzuru Tawara, Yasushi Ogasaka, Yasushi Ogasaka, Kazutoshi Haga, Kazutoshi Haga, Takashi Okajima, Takashi Okajima, Satoshi Ichimaru, Satoshi Ichimaru, Seiji Takahashi, Seiji Takahashi, Hideo Kitou, Hideo Kitou, Arifumi Gotou, Arifumi Gotou, Ken'ichi Nomoto, Ken'ichi Nomoto, Hiroyuki Satake, Hiroyuki Satake, Seima Kato, Seima Kato, Hideyo Kunieda, Hideyo Kunieda, Peter J. Serlemitsos, Peter J. Serlemitsos, Jack Tueller, Jack Tueller, } "Development of a balloonborne hard x-ray telescope using multilayer supermirror", Proc. SPIE 4138, X-Ray Optics, Instruments, and Missions IV, (28 November 2000); doi: 10.1117/12.407550; https://doi.org/10.1117/12.407550

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