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Proceedings Paper • Open Access

Direct hot slumping of thin glass foils for future generation x-ray telescopes: current state of the art and future outlooks
Author(s): B. Salmaso; S. Basso; C. Brizzolari; M. Civitani; M. Ghigo; G. Pareschi; D. Spiga; G. Tagliaferri; G. Vecchi

Paper Abstract

To significantly improve the performances of the current X-ray observatories, the next generation of X-ray telescopes has to be characterized by a large effective area (Aeff ~ 2 m2 at 1 keV) and angular resolution better than 5 arcsec. The large dimension implied by these requirements forces the use of a modular approach, splitting the optics into segments. Moreover, lightweight materials, such as glass, have to be selected for the segmented optics in order to maintain a manageable weight for the optics. Since 2009 we are developing a direct hot slumping technique assisted by pressure, in which the glass optical surface is in contact with the mould and a pressure is applied in order to force the glass to copy the mould shape. A cold slumping step is used then to integrate the mirror segments into the final Wolter-I configuration. We present the state of the art of our hot slumping technology, comparing the results obtained with different glass types and mould materials. We also provide an overview of the possibilities of this technology also in view of future developments.

Paper Details

Date Published: 17 November 2017
PDF: 9 pages
Proc. SPIE 10563, International Conference on Space Optics — ICSO 2014, 105635Z (17 November 2017); doi: 10.1117/12.2304141
Show Author Affiliations
B. Salmaso, INAF - Osservatorio Astronomico di Brera (Italy)
Univ. degli Studi dell'Insubria (Italy)
S. Basso, INAF - Osservatorio Astronomico di Brera (Italy)
C. Brizzolari, INAF - Osservatorio Astronomico di Brera (Italy)
Univ. di Milano-Bicocca (Italy)
M. Civitani, INAF - Osservatorio Astronomico di Brera (Italy)
M. Ghigo, INAF - Osservatorio Astronomico di Brera (Italy)
G. Pareschi, INAF - Osservatorio Astronomico di Brera (Italy)
D. Spiga, INAF - Osservatorio Astronomico di Brera (Italy)
G. Tagliaferri, INAF - Osservatorio Astronomico di Brera (Italy)
G. Vecchi, INAF - Osservatorio Astronomico di Brera (Italy)


Published in SPIE Proceedings Vol. 10563:
International Conference on Space Optics — ICSO 2014
Zoran Sodnik; Bruno Cugny; Nikos Karafolas, Editor(s)

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