Article (Scientific journals)
A development roadmap for critical technologies needed for TALC: A deployable 20m annular space telescope
Sauvage, Marc M.; Durand, Gilles Alphonse G. A.; Molinari, Sergio S. et al.
2016In Proceedings of SPIE: The International Society for Optical Engineering, 9904
Peer reviewed
 

Files


Full Text
99041L.pdf
Publisher postprint (665.22 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] Astronomy is driven by the quest for higher sensitivity and improved angular resolution in order to detect fainter or smaller objects. The far-infrared to submillimeter domain is a unique probe of the cold and obscured Universe, harboring for instance the precious signatures of key elements such as water. Space observations are mandatory given the blocking effect of our atmosphere. However the methods we have relied on so far to develop increasingly larger telescopes are now reaching a hard limit, with the JWST illustrating this in more than one way (e.g. it will be launched by one of the most powerful rocket, it requires the largest existing facility on Earth to be qualified). With the Thinned Aperture Light Collector (TALC) project, a concept of a deployable 20 m annular telescope, we propose to break out of this deadlock by developing novel technologies for space telescopes, which are disruptive in three aspects: An innovative deployable mirror whose topology, based on stacking rather than folding, leads to an optimum ratio of collecting area over volume, and creates a telescope with an eight times larger collecting area and three times higher angular resolution compared to JWST from the same pre-deployed volume; An ultra-light weight segmented primary mirror, based on electrodeposited Nickel, Composite and Honeycomb stacks, built with a replica process to control costs and mitigate the industrial risks; An active optics control layer based on piezo-electric layers incorporated into the mirror rear shell allowing control of the shape by internal stress rather than by reaction on a structure. We present in this paper the roadmap we have built to bring these three disruptive technologies to technology readiness level 3. We will achieve this goal through design and realization of representative elements: segments of mirrors for optical quality verification, active optics implemented on representative mirror stacks to characterize the shape correction capabilities, and mechanical models for validation of the deployment concept. Accompanying these developments, a strong system activity will ensure that the ultimate goal of having an integrated system can be met, especially in terms of (a) scalability toward a larger structure, and (b) verification philosophy.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Sauvage, Marc M.
Durand, Gilles Alphonse G. A.
Molinari, Sergio S.
Pareschi, Giovanni G.
Penfornis, Yann Y.
Sironi, Giorgia G.
Valsecchi, Giuseppe G.
Verpoort, Sven S.
Wittrock, Ulrich U.
Amiaux, Jérome J.
Austin, James W.
Bello, Mara M.
Bianucci, Giovanni
Chesne, Simon
Citterio, Oberto O.
Collette, Christophe  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Active aerospace struct. and adv. mecha. systems
Correia, Sébastien
More authors (7 more) Less
Language :
English
Title :
A development roadmap for critical technologies needed for TALC: A deployable 20m annular space telescope
Publication date :
2016
Journal title :
Proceedings of SPIE: The International Society for Optical Engineering
ISSN :
0277-786X
eISSN :
1996-756X
Publisher :
International Society for Optical Engineering, Bellingham, United States - Washington
Volume :
9904
Peer reviewed :
Peer reviewed
Commentary :
SCOPUS: cp.p Language of publication: en DOI: 10.1117/12.2231867
Available on ORBi :
since 21 October 2020

Statistics


Number of views
26 (1 by ULiège)
Number of downloads
63 (2 by ULiège)

Scopus citations®
 
8
Scopus citations®
without self-citations
6
OpenCitations
 
6

Bibliography


Similar publications



Contact ORBi