TY - JOUR
T1 - Development of multilayer supermirror for hard X-ray telescope
AU - Tawara, Y.
AU - Yamashita, K.
AU - Kunieda, H.
AU - Tamura, K.
AU - Furuzawa, A.
AU - Haga, K.
AU - Nakajo, N.
AU - Okajima, T.
AU - Takata, H.
AU - Serlemitsos, P. J.
AU - Tueller, J.
AU - Petre, R.
AU - Soong, Y.
AU - Chan, K.
AU - Lodha, G. S.
PY - 1998
Y1 - 1998
N2 - We present a current status of the development of hard X-ray telescope using Pt/C multilayer supermirror. The telescope system is to be made by combining thin foil replication technology for high throughput mirror and multilayer supermirror coating technology for hard X-ray reflection. After the successful multilayer coating on the replica foil mirror, we made the performance demonstration model of this type of telescope, having 20 replica foil supermirrors, 10 primary and 10 secondary reflecters, with focal length of 4.75 m and radius of 100 mm. Pt/C multilayer supermirror structure was designed and optimized to have high and flat reflectivity for X-ray energy from 25 through 40 keV. After some efforts to avoid heat damage of replica foil mirror during the deposition process of multilayer by DC sputtering system, we could establish the fabrication method of supermirror structure on replica foil mirror. Based on the X-ray measurement, we found that this demonstration model showed the half power diameter of 1.9 arcmin for hard X-rays and nearly same reflectivity and energy band width as expected. In this paper, we present the design of graded multilayer as the supermirror, the fabrication and the performance of this demonstration model.
AB - We present a current status of the development of hard X-ray telescope using Pt/C multilayer supermirror. The telescope system is to be made by combining thin foil replication technology for high throughput mirror and multilayer supermirror coating technology for hard X-ray reflection. After the successful multilayer coating on the replica foil mirror, we made the performance demonstration model of this type of telescope, having 20 replica foil supermirrors, 10 primary and 10 secondary reflecters, with focal length of 4.75 m and radius of 100 mm. Pt/C multilayer supermirror structure was designed and optimized to have high and flat reflectivity for X-ray energy from 25 through 40 keV. After some efforts to avoid heat damage of replica foil mirror during the deposition process of multilayer by DC sputtering system, we could establish the fabrication method of supermirror structure on replica foil mirror. Based on the X-ray measurement, we found that this demonstration model showed the half power diameter of 1.9 arcmin for hard X-rays and nearly same reflectivity and energy band width as expected. In this paper, we present the design of graded multilayer as the supermirror, the fabrication and the performance of this demonstration model.
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M3 - Conference article
AN - SCOPUS:0032292056
SN - 0277-786X
VL - 3444
SP - 569
EP - 575
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
T2 - Proceedings of the 1998 Conference on X-Ray Optics, Instruments, and Missions
Y2 - 19 July 1998 through 22 July 1998
ER -