Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-19T05:22:18.027Z Has data issue: false hasContentIssue false
  • English
  • Français

Multilayer Coatings for Focusing Hard X-ray Telescopes

Published online by Cambridge University Press:  10 February 2011

A. Ivan ,
R. Bruni ,
K. Byun ,
J. Everett ,
P. Gorenstein  and
S. Romaine
A. Ivan
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA MIT, Dept. of Nuclear Engr., Cambridge, MA
R. Bruni
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
K. Byun
Affiliation:
Harvard University, Cambridge, MA
J. Everett
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
P. Gorenstein
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
S. Romaine
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
Get access

Abstract

Several multilayer test coatings for hard X-ray telescopes were fabricated using DC magnetron sputtering. The process parameters were selected from a series of trials of single layer depositions. The samples were characterized using X-ray specular reflectivity scans, AFM, and cross-sectional TEM. Additional measurements (stylus profilometry, RBS, and Auger analysis) were used in the optimization of the deposition rate and of the thin film properties (density, composition, surface/interface microroughness). The X-ray reflectivity scans showed that the combinations of reflector and spacer materials tested so far (W/Si and W/C) are suited for graded d-spacing multilayer coatings that present a constant reflectivity bandpass up to 70 keV.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 551: Symposium JJ – Materials in Space-Science, Technology & Exploration , 1998 , 297
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Christensen, F.E., Hornstrup, A., Westgaard, N.J., Schnopper, J., Wood, J., Parker, K., “A gradeddspacing multilayer telescope for high-energy x-ray astronomy”, Proc. SPIE, 1546, pp. 160–167, 1992 Google Scholar
[2] Bruni, R., Ivan, A., Byun, K., Everett, J., Gorenstein, P., Romaine, S., Hussain, A., “Uniformity of coatings for cylindrical substrates for hard x-ray telescopes”, these proceedingsGoogle Scholar
[3] Windt, D.L., “IMD version 4.0”, http:// www.bell-labs.com/user/windt/idl/imd/index.htmlGoogle Scholar
[4] Joensen, K.D., Christensen, F.E., Schnopper, H.W., Gorenstein, P., Susini, J., Høghøj, P., Hustache, R., Wood, J., Parker, K., “Medium-sized grazing incidence high-energy x-ray telescopes employing continously graded multilayers”, Proc. SPIE, 1736, pp.239–248, 1993 Google Scholar