Getting ready for serial production of the segmented 39-meter ELT primary: status, challenges and strategies

M. Dimmler; P. Barriga; M. Cayrel; F. Derie; A. Foerster; F. Gonte; J. C. Gonzalez; L. Jochum; N. Kornweibel; S. Leveque; C. Lucuix; L. Pettazzi

doi:10.1117/12.2312073

6 July 2018 Getting ready for serial production of the segmented 39-meter ELT primary: status, challenges and strategies

M. Dimmler, P. Barriga, M. Cayrel, F. Derie, A. Foerster, F. Gonte, J. C. Gonzalez, L. Jochum, N. Kornweibel, S. Leveque, C. Lucuix, L. Pettazzi

Author Affiliations +

Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 1070043 (2018) https://doi.org/10.1117/12.2312073
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

In the last years the ELT Program has entered construction phase. For the large 39 meter segmented primary mirror unit with thousands of components this means that the start of the series production is getting closer, where the final hardware will be built. The M1 Unit has been broken down in products and a procurement strategy has been developed. Most of the major design decisions have been frozen and component specifications have been settled. Most of the suppliers have already been selected and contracts have been kicked off. This paper describes the ELT M1 Unit product breakdown and the procurement baseline for each product and its status. The production contracts would not have been possible without intense prototyping and verification strategies independent of the component contracts. Therefore, the paper also takes a look back at the prototypes and de-risking strategies, which had been put in place to prepare for construction phase. Ramping up the construction contracts involves finishing design details for some products while setting up production lines for others. This requires controlling interfaces and cross-contract dependencies, a challenge described in this paper. For continuous de-risking similar verification strategies than during the design phase are planned in parallel with the production until telescope assembly, integration and verification. These measures will increase confidence in the design choices, allow early discovery of remaining design flaws and provide training means for assembly and integration long time before all components of the ELT M1 are complete and being installed on Cerro Armazones in Chile. The paper will also give an outlook on these running and planned activities.

Citation Download Citation

M. Dimmler, P. Barriga, M. Cayrel, F. Derie, A. Foerster, F. Gonte, J. C. Gonzalez, L. Jochum, N. Kornweibel, S. Leveque, C. Lucuix, and L. Pettazzi "Getting ready for serial production of the segmented 39-meter ELT primary: status, challenges and strategies", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070043 (6 July 2018); https://doi.org/10.1117/12.2312073

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