Development of multilayer supermirror for hard X-ray telescope

Y. Tawara, K. Yamashita, H. Kunieda, K. Tamura, A. Furuzawa, K. Haga, N. Nakajo, T. Okajima, H. Takata, P. J. Serlemitsos, J. Tueller, R. Petre, Y. Soong, K. Chan, G. S. Lodha

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Abstract

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.

Original languageEnglish
Pages (from-to)569-575
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3444
Publication statusPublished - 01-12-1998
EventProceedings of the 1998 Conference on X-Ray Optics, Instruments, and Missions - San Diego, CA, USA
Duration: 19-07-199822-07-1998

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Tawara, Y., Yamashita, K., Kunieda, H., Tamura, K., Furuzawa, A., Haga, K., Nakajo, N., Okajima, T., Takata, H., Serlemitsos, P. J., Tueller, J., Petre, R., Soong, Y., Chan, K., & Lodha, G. S. (1998). Development of multilayer supermirror for hard X-ray telescope. Proceedings of SPIE - The International Society for Optical Engineering, 3444, 569-575.