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Proceedings Paper

Space applications of Si/B4C multilayer coatings at extreme ultra-violet region; comparison with standard Mo/Si coatings
Author(s): F. Frassetto; D. Garoli; G. Monaco; P. Nicolosi; M. Pascolini; M. G. Pelizzo; V. Mattarello; A. Patelli; V. Rigato; A. Giglia; S. Nannarone; E. Antonucci; S. Fineschi; M. Romoli
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Paper Abstract

In the extreme ultra-violet region, multilayer coatings are the only technique to obtain high reflectivity in normal incidence optical configurations. The interference process which regulates periodic multilayers behavior offers narrow-band spectral filtering without the use of additional filters, fact that makes these coatings particularly suitable for lines emission observations. Despite the large amount of possible materials combinations, Mo/Si multilayers are the standard choice for space research on plasma physics in the 13 - 30 nm spectral region. In this work Si/B4C is presented as an alternative material couple for the 30.4 nm selection. Attractive features are the better spectral purity and the second order reflectivity reduction. A possible application to the Sounding CORonagraph Experiment is described as an example. B4C thin films have been used to characterize this material in terms of optical constants in the 40 nm - 150 nm spectral region where, currently, only few data are available.

Paper Details

Date Published: 18 August 2005
PDF: 12 pages
Proc. SPIE 5901, Solar Physics and Space Weather Instrumentation, 59010L (18 August 2005); doi: 10.1117/12.616848
Show Author Affiliations
F. Frassetto, CNR-INFM LUXOR Lab. (Italy)
Univ. of Padova (Italy)
D. Garoli, CNR-INFM LUXOR Lab. (Italy)
Univ. of Padova (Italy)
G. Monaco, CNR-INFM LUXOR Lab. (Italy)
Univ. of Padova (Italy)
P. Nicolosi, CNR-INFM LUXOR Lab. (Italy)
Univ. of Padova (Italy)
M. Pascolini, CNR-INFM LUXOR Lab. (Italy)
Univ. of Padova (Italy)
M. G. Pelizzo, CNR-INFM LUXOR Lab. (Italy)
Univ. of Padova (Italy)
V. Mattarello, INFM, Lab. Nozionali di Legnaro (Italy)
A. Patelli, INFM, Lab. Nozionali di Legnaro (Italy)
V. Rigato, INFM, Lab. Nozionali di Legnaro (Italy)
A. Giglia, CNR Lab. TASC-INFM (Italy)
S. Nannarone, CNR Lab. TASC-INFM (Italy)
E. Antonucci, National Institute for Astrophysics, Osservatorio Astronomico di Torino (Italy)
S. Fineschi, National Institute for Astrophysics, Osservatorio Astronomico di Torino (Italy)
M. Romoli, Univ. di Firenze (Italy)


Published in SPIE Proceedings Vol. 5901:
Solar Physics and Space Weather Instrumentation
Silvano Fineschi; Rodney A. Viereck, Editor(s)

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