Speaker
Riccardo Desalvo
Description
This report presents a finite element study of the resonance modes of a 2-meter pendulum beam intended for the Einstein Telescope low-frequency cryogenic mirror suspensions. Three beam materials, anisotropic monocrystalline silicon, isotropic monocrystalline sapphire, and isotropic silicon carbide ceramics, were simulated with and without a counterweight. The result shows that the silicon beam places the longitudinal banana mode within the ET-LF detection band (~27.8 Hz), while sapphire and SiC provide significantly higher elastic stiffness. Sapphire is a well-characterized cryogenic material, whereas the cryogenic thermal conductivity of SiC remains insufficiently known and requires experimental measurements.
Author
Nelson Leon
(California State University of Los Angeles)
Co-authors
Fabián Peña Arellano
(California State University at Los Angeles)
Harry Theman
(California State University of Los Angeles)
Leonardo Gonzalez
(universidad de Guadalajara)
Riccardo Desalvo
britney Gallego
(California State University of Los Angeles)