Development of the hard x-ray telescope for balloon-borne experiment

Keisuke Tamura; Yasushi Ogasaka; Ryo Shibata; Akihiro Furuzawa; Taku Futamura; Rika Takahashi; Yuzuru Tawara; Kojun Yamashita; Hideyo Kunieda; Jack Tuller; Peter J. Serlemitsos; Takashi Okajima

doi:10.1117/12.505655

29 January 2004 Development of hard x-ray telescope for balloon-borne experiment

Keisuke Tamura, Yasushi Ogasaka, Ryo Shibata, Akihiro Furuzawa, Taku Futamura, Rika Takahashi, Yuzuru Tawara, Kojun Yamashita, Hideyo Kunieda, Jack Tuller, Peter J. Serlemitsos, Takashi Okajima

Author Affiliations +

Proceedings Volume 5168, Optics for EUV, X-Ray, and Gamma-Ray Astronomy; (2004) https://doi.org/10.1117/12.505655
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

We have been developing the hard X-ray telescope for balloon borne experiment named InFOCμS. The first InFOCμS flight was carried out on July, 2001. In this flight, we obtained hard X-ray image of Cygnus X-1 above 20 keV. This is first observation with hard X-ray telescope using multilayers. In this mission, the platinum-carbon depth graded multilayers (supermirror) are used as X-ray reflectors combining multi nested thin foil optics to obtain enough efficiency in the hard X-ray region. They make us possible to obtain 40 cm³ effective area at 30 keV with 40 cm diameter of the telescope. After the first flight, the hard X-ray telescope was recovered without any damages, we measured performances of the telescope in synchrotron radiation facility SPring-8. We obtained the results, the half power diameter (HPD) is 2.4 arcmin and effective area is 38 cm² at 30 keV. These results show that no degradation of the performances of the hard X-ray telescope was observed in this measurement. Furthermore, we begin to fabricate new hard X-ray telescope for future InFOCμS flight. The design of the multilayer supermirrors are improved to widen the energy band. The performances of this telescope including effective area and spatial resolution are measured using synchrotron radiation facility SPring-8 and ISAS 30 m X-ray beam line. The measured effective area is significantly larger than the first telescope especially above 30 keV.

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Keisuke Tamura, Yasushi Ogasaka, Ryo Shibata, Akihiro Furuzawa, Taku Futamura, Rika Takahashi, Yuzuru Tawara, Kojun Yamashita, Hideyo Kunieda, Jack Tuller, Peter J. Serlemitsos, and Takashi Okajima "Development of hard x-ray telescope for balloon-borne experiment", Proc. SPIE 5168, Optics for EUV, X-Ray, and Gamma-Ray Astronomy, (29 January 2004); https://doi.org/10.1117/12.505655

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KEYWORDS

X-ray telescopes

Telescopes

Hard x-rays

Space telescopes

X-rays

Mirrors

Synchrotron radiation

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