Measurement of vibrational damping at cryogenic temperatures for silicon carbide foam and silicon foam materials

Chia-Yen Peng; Marie Levine; Lillian Shido; Marc Jacoby; William Goodman

doi:10.1117/12.619766

18 August 2005 Measurement of vibrational damping at cryogenic temperatures for silicon carbide foam and silicon foam materials

Chia-Yen Peng, Marie Levine, Lillian Shido, Marc Jacoby, William Goodman

Author Affiliations +

Proceedings Volume 5868, Optical Materials and Structures Technologies II; 58680I (2005) https://doi.org/10.1117/12.619766
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The Terrestrial Planet Finder mission requires extreme dynamic stability at cryogenic temperatures in order to carry out its objectives of searching for and observing extraterrestrial planets. As a result, the ability to meet its ambitious science goals will be significantly enhanced by increasing its vibrational damping at cryogenic temperatures. Given the low inherent structural damping at cryogenic temperatures, significant reduction in vibration amplitude could be gained with only modest increases in damping on the structure. To examine the use of vibrational damping options to improve the dynamic stability of cryogenic structures, Jet Propulsion Laboratory has conducted a series of experiments to measure the damping levels of various materials at cryogenic temperatures and to search for the materials with higher cryogenic damping. This paper summarizes our experimental observations on the material damping of silicon foam and silicon carbide foam materials at cryogenic temperatures. These foam materials have been independently developed by Schafer Corporation and have properties that enable their applications in space environments with a range of temperature from 25K to 500K. These materials have been used for mirrors, and uses for foam based structures such as optical mounts and benches are currently in development. As observed from the measured damping, these two foam materials have higher damping than aluminum at cryogenic temperatures, and the damping level is relatively insensitive to temperature change from room to cryogenic temperatures. As a result, these materials may be potential candidates to achieve increased levels of cryogenic damping for the Terrestrial Planet Finder mission.

Citation Download Citation

Chia-Yen Peng, Marie Levine, Lillian Shido, Marc Jacoby, and William Goodman "Measurement of vibrational damping at cryogenic temperatures for silicon carbide foam and silicon foam materials", Proc. SPIE 5868, Optical Materials and Structures Technologies II, 58680I (18 August 2005); https://doi.org/10.1117/12.619766

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