Comparing the low-frequency performance of maraging and glassy metal cantilever blade springs

Document #:

LIGO-G1701306-v1

Document type:

G - Presentations (eg Graphics)

Abstract:

Virtually all cantilever blade springs used in gravitational wave detectors for seismic attenuation are made with maraging steel. Geometric anti-spring filters made from this material and designed to reach arbitrarily low resonant frequencies have shown instabilities that impede their tuning below 1⁄2 Hertz. The instability and low frequency noise can be attributed to self-organized criticality effects within the material. The suspects are avalanches of disentangling/re-entangling dislocations that randomly change the filter’s equilibrium point.

Files in Document:

• AmaldiPosterMS.pdf (4.2 MB)

Topics:

• Seismic Isolation
• Suspensions
• Public Talk / Colloquium

Authors:

• Morgan Shaner
• Riccardo DeSalvo

Keywords:

LM105 GAS seismic SOC maraging

Associated with Events:

Amaldi 12 held on 09 Jul 2017 in Hilton Hotel, Pasadena, CA