Richman, S.
(2008),
Progress on low-frequency active vibration isolation, Marcel Grossmann Meeting on General Relativity
(Accessed December 10, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Progress on low-frequency active vibration isolation
Published
Author(s)
S J. Richman
Abstract
The gravity group at JILA is constructing a three-stage active isolation system to demonstrate useful reduction of low-frequency seismic noise for a gravitational wave interferometer. The control loops on the first two stages are now fully functional in all six rigid-body degrees-of-freedom. Measurements of the responce of the system to large input signals have shown an isolation factor of 3x103 in both vertical and horizontal directions at frequencies of 1 Hz and above. With the most important control system problems solved, we have turned out attention to noise reduction. The first main stage seismometers have been instumented with high-sensitivity readouts. These are single-bounce Michelson interferometers using corner cubes, each illuminated with 1.3 υm light delivered via optical fiber from a quiet Nd:YAG laser. The interfoerometers should allow a shot noise-limited seismometer performance of 3x10-15m/Hz.Citation
Marcel Grossmann Meeting on General Relativity
Pub Type
Journals
Keywords
gravitational waves, LIGO, seismic isolation, seisometers
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created October 16, 2008