Subtraction of Newtonian noise using optimized sensor arrays
Abstract
Fluctuations in the local Newtonian gravitational field present a limit to high precision measurements, including searches for gravitational waves using laser interferometers. In this work, we present a model of this perturbing gravitational field and evaluate schemes to mitigate the effect by estimating and subtracting it from the interferometer data stream. Information about the Newtonian noise is obtained from simulated seismic data. The method is tested on causal as well as acausal implementations of noise subtraction. In both cases it is demonstrated that broadband mitigation factors close to 10 can be achieved removing Newtonian noise as a dominant noise contribution. The resulting improvement in the detector sensitivity will substantially enhance the detection rate of gravitational radiation from cosmological sources.
Additional Information
© 2012 American Physical Society. Received 27 July 2012; published 1 November 2012. We thank the National Science Foundation for support under Grant No. PHY-0555406. J.C.D. also acknowledges the support of the NSF.We thank R. Schofield and A. Effler for their help with the measurements presented in Sec. II. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under cooperative agreement PHY-0107417. This article has LIGO internal Document No. P1200017.Attached Files
Published - PhysRevD.86.102001.pdf
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Additional details
- Eprint ID
- 35720
- Resolver ID
- CaltechAUTHORS:20121129-084419241
- NSF
- PHY-0555406
- NSF
- NSF
- PHY-0107417
- Created
-
2012-11-29Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Other Numbering System Name
- LIGO internal Document
- Other Numbering System Identifier
- No. P1200017