Share Email Print
cover

Proceedings Paper

Astronomical soft x-ray mirrors reflectivity enhancement by multilayer coatings with carbon overcoating
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A number of X-ray astronomical missions of near future will make use of hard X-ray optics with broad-band multilayer coatings. However multilayer mirrors can be also useful to enhance the effective area of a given X-ray telescope in the "classical" low energy X-ray band (0.1 - 10 keV), the window where X-ray spectroscopy provides very useful plasma diagnostics) with a consistent gain with respect to usual single-layer reflectors. Multilayers for soft X-rays are based on stacks with constant d-spacing (in order to minimize the loss due to the photoelectric effect). A further gain in reflectivity (however only restricted to the energy range between 0.5 and 4 keV) can be achieved by using a low density material as a first external layer of the film, with the role of reducing the photoelectric absorption effect when the mirror acts in total external reflection regime (Carbon is the most performing material for this specific scope). In this paper the impact of using soft X-ray multilayer mirrors in future X-ray telescopes is discussed, and soft X-ray reflectivity tests performed on prototype samples presented.

Paper Details

Date Published: 11 October 2004
PDF: 11 pages
Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, (11 October 2004); doi: 10.1117/12.556838
Show Author Affiliations
Giovanni Pareschi, INAF, Osservatorio Astronomico di Brera (Italy)
Vincenzo Cotroneo, INAF, Osservatorio Astronomico di Brera (Italy)
Daniele Spiga, INAF, Osservatorio Astronomico di Brera (Italy)
Dervis Vernani, INAF, Osservatorio Astronomico di Brera (Italy)
Marco Barbera, INAF, Osservatorio Astronomico di Palermo (Italy)
Maria Antonella Artale, INAF, Osservatorio Astronomico di Palermo (Italy)
Alfonso Collura, INAF, Osservatorio Astronomico di Palermo (Italy)
Salvatore Varisco, INAF, Osservatorio Astronomico di Palermo (Italy)
Gabriele Grisoni, Media Lario S.r.l. (Italy)
Giuseppe Valsecchi, Media Lario S.r.l. (Italy)
Barbara Negri, Agenzia Spaziale Italiana (Italy)


Published in SPIE Proceedings Vol. 5488:
UV and Gamma-Ray Space Telescope Systems
Guenther Hasinger; Martin J. L. Turner, Editor(s)

© SPIE. Terms of Use
Back to Top