Warm calibration unit of the mid-infrared E-ELT instrument METIS: overview and current status of the project

Monika Rutowska; Tarun Sharma; Michael Wiest; Sabine Graf; Christian Straubmeier; Steffen Rost; Lucas Labadie; Andreas Eckart; Leonard Burtscher; Tibor Agócs; Dirk Lesman; Remko Stuik; Adrian Glauser; Bernhard Brandl; Felix Bettonvil

doi:10.1117/12.2562219

13 December 2020 Warm calibration unit of the mid-infrared E-ELT instrument METIS: overview and current status of the project

Monika Rutowska, Tarun Sharma, Michael Wiest, Sabine Graf, Christian Straubmeier, Steffen Rost, Lucas Labadie, Andreas Eckart, Leonard Burtscher, Tibor Agócs, Dirk Lesman, Remko Stuik, Adrian Glauser, Bernhard Brandl, Felix Bettonvil

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114472T (2020) https://doi.org/10.1117/12.2562219
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The warm calibration unit (WCU) is one subsystem of the future METIS instrument on the European Extremely Large Telescope (E-ELT). Operating at daytime temperature, the WCU is mounted above the main cryostat of METIS and will be employed as calibration reference for science observations, as well as for verification and alignment purposes during the AIT phase. The WCU is designed and constructed at the University of Cologne, partner in the METIS consortium. The WCU, together with the full METIS instrument, went recently through a successful preliminary design review (PDR) phase at ESO and is entering now the Phase C of the project. In this paper, we present the current status of the WCU and summarize the mostly mechanical and optical engineering work. We adopted a hexapod unit to interface with the METIS cryostat and a CFRP-based optical bench to optimally cope with alignment flexure. We develop the case for fiber-fed laser sources feeding the integrating sphere for spectral calibration of the LM-Spectrograph of METIS. We detail the activity foreseen for Phase C including the optical tolerances analysis, the eigenfrequency and earthquake analysis and a preparation of the sub-system MAIT work, finishing the paper with a short overview of the WCU future plans.

Citation Download Citation

Monika Rutowska, Tarun Sharma, Michael Wiest, Sabine Graf, Christian Straubmeier, Steffen Rost, Lucas Labadie, Andreas Eckart, Leonard Burtscher, Tibor Agócs, Dirk Lesman, Remko Stuik, Adrian Glauser, Bernhard Brandl, and Felix Bettonvil "Warm calibration unit of the mid-infrared E-ELT instrument METIS: overview and current status of the project", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114472T (13 December 2020); https://doi.org/10.1117/12.2562219

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available