Grazing incidence Fe-line telescopes using W/B4C multilayers

Karsten Dan Joensen; Paul Gorenstein; Finn Erland Christensen; George Gutman

doi:10.1117/12.167211

1 February 1994 Grazing incidence Fe-line telescopes using W/B₄C multilayers

Karsten Dan Joensen, Paul Gorenstein, Finn Erland Christensen, George Gutman

Proceedings Volume 2011, Multilayer and Grazing Incidence X-Ray/EUV Optics II; (1994) https://doi.org/10.1117/12.167211
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Traditional high-Z coated X-ray telescopes for the >= 1 keV range all have a loss of throughput with higher energies, owing to the inverse proportionality between the critical angle and energy. We have shown that this can, to some degree, be countered by employing multilayers on the outermost reflectors. A W/B₄C multilayer has been fabricated and its 8 keV X-ray reflectivity measured and modeled, yielding an interface-roughness of 3.6 angstroms. This measurement and the resulting model-fit form the basis for computing the performance of `AXAF-S'-sized conical and Kirkpatrick-Baez telescopes. Depending on the specifics of the design, a factor 3 - 5 increased throughput was obtained in a narrow energy band, or a 30 - 100% increase in a wider-band. This throughput ia gained at the expense of the throughput at 2 - 4 keV, which is reduced by 20 - 30%.

Citation Download Citation

Karsten Dan Joensen, Paul Gorenstein, Finn Erland Christensen, and George Gutman "Grazing incidence Fe-line telescopes using W/B₄C multilayers", Proc. SPIE 2011, Multilayer and Grazing Incidence X-Ray/EUV Optics II, (1 February 1994); https://doi.org/10.1117/12.167211

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