ASPECTS OF THE SUSPENSION SYSTEM FOR GEO-600

Citation
Mv. Plissi et al., ASPECTS OF THE SUSPENSION SYSTEM FOR GEO-600, Review of scientific instruments, 69(8), 1998, pp. 3055-3061
Citations number
22
Categorie Soggetti
Physics, Applied","Instument & Instrumentation
ISSN journal
00346748
Volume
69
Issue
8
Year of publication
1998
Pages
3055 - 3061
Database
ISI
SICI code
0034-6748(1998)69:8<3055:AOTSSF>2.0.ZU;2-1
Abstract
The GEO 600 gravitational wave detector is currently under constructio n in Germany. To ensure that the detector sensitivity is not limited b y seismic noise above 50 Hz a significant degree of seismic isolation has to be provided for each test mass. To achieve this level of isolat ion each test mass, which will be made from fused silica (mass similar to 14 kg), will be suspended as the final stage of a triple pendulum from an isolation stack consisting of layers of stainless steel masses and graphite loaded silicone rubber. Extending from the stack will be three cantilever springs supporting an upper mass from which a double pendulum stage will be suspended. This double pendulum will incorpora te cantilever springs in the upper stage in order to enhance the verti cal isolation, and will use fused silica fibers in the lower pendulum stage in order to minimize thermal noise from the pendulum modes. The expected performance from this arrangement of stacks, vertical spring stages, and double pendulums should achieve our goals for seismic isol ation. (C) 1998 American Institute of Physics.