Title
Dimensional stability testing in thermal vacuum of the CHEOPS optical telescope assembly
Author
Klop, W.A.
Verlaan, A.L.
Contributor
MacEwen, H.A. (editor)
Lystrup, M. (editor)
Fazio, G.G. (editor)
Publication year
2016
Abstract
The CHEOPS mission (CHaracterising ExOPlanet Satellite) is dedicated to searching for exoplanetary transits by performing ultra-high precision photometry on bright stars already known to host planets. A 32cm diameter on-axis Ritchey-Chrétien telescope is used for imaging onto a single cooled detector. With integration times up to 48 hours the thermal stability of the telescope and its structure are key to the performance. Using a multi-lateration interferometer setup TNO has successfully demonstrated the μm-level stability of the Structural Thermal Model (STM2) of the Optical Telescope Assembly (OTA) in thermal vacuum. This OTA was later upgraded to become the Flight Model. Experiments comprise thermal vacuum cycling, thermal vacuum stability testing where axial and lateral deformations are measured to the nm-level sensitivity.
Subject
Nano Technology
OM - Opto-Mechatronics
TS - Technical Sciences
High Tech Systems & Materials
Electronics
Industrial Innovation
CHEOPS
Optical telescope assembly
Thermal stability
Thermal vacuum facility
Extrasolar planets
Millimeter waves
Satellites
Space telescopes
Thermodynamic stability
Cooled detectors
Flight models
Lateral deformation
Thermal model
Thermal vacuum
Thermal vacuum cycling
Optical telescopes
To reference this document use:
http://resolver.tudelft.nl/uuid:9018b182-7119-4189-93ca-4588cb16a85c
TNO identifier
573276
Publisher
SPIE
ISBN
9781510601871
ISSN
0277-786X
Source
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 26 June - 1 July 2016, 9904
Series
Proceedings of SPIE - The International Society for Optical Engineering
Article number
990437
Document type
conference paper