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Proceedings Paper

Development of the hard x-ray telescope for balloon-borne experiment
Author(s): 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
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Paper 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.

Paper Details

Date Published: 29 January 2004
PDF: 9 pages
Proc. SPIE 5168, Optics for EUV, X-Ray, and Gamma-Ray Astronomy, (29 January 2004); doi: 10.1117/12.505655
Show Author Affiliations
Keisuke Tamura, Nagoya Univ. (Japan)
Yasushi Ogasaka, Nagoya Univ. (Japan)
Ryo Shibata, Nagoya Univ. (Japan)
Akihiro Furuzawa, Nagoya Univ. (Japan)
Taku Futamura, Nagoya Univ. (Japan)
Rika Takahashi, Nagoya Univ. (Japan)
Yuzuru Tawara, Nagoya Univ. (Japan)
Kojun Yamashita, Nagoya Univ. (Japan)
Hideyo Kunieda, Institute of Space and Astronautical Science (Japan)
Jack Tuller, NASA Goddard Space Flight Ctr. (United States)
Peter J. Serlemitsos, NASA Goddard Space Flight Ctr. (United States)
Takashi Okajima, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 5168:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy
Oberto Citterio; Stephen L. O'Dell, Editor(s)

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