TY  - CONF
A1  - Sauvage, Marc
A1  - Amiaux, Jérome
A1  - Austin, James
A1  - Bello, Mara
A1  - Bianucci, Giovanni
A1  - Chesné, Simon
A1  - Citterio, Oberto
A1  - Collette, Christophe
A1  - Correia, Sébastien
A1  - Durand, Gilles A.
A1  - Molinari, Sergio
A1  - Pareschi, Giovanni
A1  - Penfornis, Yann
A1  - Sironi, Giorgia
A1  - Valsecchi, Guiseppe
A1  - Verpoort, Sven
A1  - Wittrock, Ulrich
T1  - A development roadmap for critical technologies needed for TALC: a deployable 20m annular space telescope
T2  - Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, Proc. SPIE
N2  - 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.
Y1  - 2016
UR  - https://www.hb.fh-muenster.de/opus4/frontdoor/index/index/docId/924
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:836-opus-9248
VL  - 9904
SP  - 99041L
ER  -