LUVOIR backplane thermal architecture development through the composite CTE sensitivity study

Sang C. Park; Michael J. Eisenhower; Marcel Bluth; Matthew R. Bolcar; Lee D. Feinberg; J. Scott Knight; David C. Redding

doi:10.1117/12.2274632

5 September 2017 LUVOIR backplane thermal architecture development through the composite CTE sensitivity study

Sang C. Park, Michael J. Eisenhower, Marcel Bluth, Matthew R. Bolcar, Lee D. Feinberg, J. Scott Knight, David C. Redding

Author Affiliations +

Proceedings Volume 10398, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII; 103980D (2017) https://doi.org/10.1117/12.2274632
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

The Large UV/Optical/IR Surveyor (LUVOIR) is one of four 2020 Decadal Survey Missions, a concept for ‘flag-ship’ class space-borne observatory, operating across the multi-wavelength UV/Optical/NIR spectra. An Optical Telescope concept being considered is the segmented primary mirror architecture with composite backplane structure. In order to achieve the high-contrast imaging required to satisfy the primary science goals of this mission would require, roughly, 10 pico-meter wavefront RMS stability over a wavefront control time step of approximately 10 minutes. The LUVOIR primary mirror backplance support structure (PMBSS) requires active thermal management to maintain operational temperature while on orbit. Furthermore, the active thermal control must be sufficiently stable to prevent time-varying thermally induced distortions in the PMBSS. This paper describes a systematic approach to developing a thermal architecture of a modular composite section of the mirror support structure heavily guided by the sensitivity studies of the composite Coefficient of Thermal Expansion (CTE) values. Thermal and finite-element models, sensitivity studies against the absolute values and their variations of the composite CTE, the early findings from the thermal and thermaldistortion analyses are presented.

Conference Presentation

Citation Download Citation

Sang C. Park, Michael J. Eisenhower, Marcel Bluth, Matthew R. Bolcar, Lee D. Feinberg, J. Scott Knight, and David C. Redding "LUVOIR backplane thermal architecture development through the composite CTE sensitivity study", Proc. SPIE 10398, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII, 103980D (5 September 2017); https://doi.org/10.1117/12.2274632

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