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Proceedings Paper • Open Access

Using CeSiC for UV spectrographs for the WSO/UV
Author(s): A. Reutlinger; C. Gál; C. Brandt; P. Haberler; K.-H. Zuknik; T. Sedlmaier; B. Shustov; M. Sachkov; A. Moisheev; N. Kappelmann; J. Barnstedt; K. Werner

Paper Abstract

The World Space Observatory Ultraviolet (WSO/UV) is a multi-national project lead by the Russian Federal Space Agency (Roscosmos) with the objective of high performance observations in the ultraviolet range. The 1.7 m WSO/UV telescope feeds UV spectrometers and UV imagers. The UV spectrometers comprise two high resolution Echelle spectrographs for the 100 − 170 nm and 170 − 300 nm wavelength range and a long slit spectrograph for the 100 − 300 nm band. All three spectrometers represent individual instruments that are assembled and aligned separately. In order to save mass while maintaining high stiffness, the instruments are combined to a monoblock. Cesic has been selected to reduce CTE related distortions of the instruments.

In contrast to aluminium, the stable structure of Cesic is significantly less sensitive to thermal gradients. No further mechanism for focus correction with high functional, technical and operational complexity and dedicated System costs are necessary. Using Cesic also relaxes the thermal control requirements of ±5°C, which represents a considerable cost driver for the S/C design.

The WUVS instrument is currently studied in the context of a phase B2 study by Kayser-Threde GmbH including a Structural Thermal Model (STM) for verification of thermal and mechanical loads, stability due to thermal distortions and Cesic manufacturing feasibility.

Paper Details

Date Published: 20 November 2017
PDF: 7 pages
Proc. SPIE 10565, International Conference on Space Optics — ICSO 2010, 105652G (20 November 2017); doi: 10.1117/12.2309104
Show Author Affiliations
A. Reutlinger, Kayser-Threde GmbH (Germany)
C. Gál, Kayser-Threde GmbH (Germany)
C. Brandt, Kayser-Threde GmbH (Germany)
P. Haberler, Kayser-Threde GmbH (Germany)
K.-H. Zuknik, Kayser-Threde GmbH (Germany)
T. Sedlmaier, Kayser-Threde GmbH (Germany)
B. Shustov, Institute of Astronomy, INASAN (Russian Federation)
M. Sachkov, Institute of Astronomy, INASAN (Russian Federation)
A. Moisheev, Lavochkin Association (Russian Federation)
N. Kappelmann, Institut für Astronomie und Astrophysik (Germany)
J. Barnstedt, Institut für Astronomie und Astrophysik (Germany)
K. Werner, Institut für Astronomie und Astrophysik (Germany)

Published in SPIE Proceedings Vol. 10565:
International Conference on Space Optics — ICSO 2010
Errico Armandillo; Bruno Cugny; Nikos Karafolas, Editor(s)

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