Control of AIGO High Performance Vibration Isolation System in an 80 m Fabry-Perot Cavity

Document #:

LIGO-G0900578-v1

Document type:

G - Presentations (eg Graphics)

Abstract:

Two high performance passive vibration isolation systems are used in an 80m optical cavity at ACIGA’s Gingin high optical power facility. . We present the control and performance of the vibration isolation system. Optical lever were used to c achieving low angular noise. Initial run with high damping of inverse pendulum has residual motion performance at nanometre level (~3 nm per test mass). Improved feedback scheme using differential motion of the inverse pendulum and Roberts linkage stage allows orders of magnitude improvement.

Files in Document:

• JCDumas_amaldi8.pdf (1.9 MB)

Topics:

• Seismic Isolation

Authors:

• Jean-Charles Dumas