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Author Harms, Jan ♦ DeSalvo, Riccardo ♦ Dorsher, Steven ♦ Mandic, Vuk
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2009-10-15
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword General Relativity and Quantum Cosmology ♦ physics:gr-qc
Abstract In this paper, we develop a new approach to gravity-gradient noise subtraction for underground gravitational-wave detectors in homogeneous rock. The method is based on spatial harmonic expansions of seismic fields. It is shown that gravity-gradient noise produced by seismic fields from distant sources, stationary or non-stationary, can be calculated from seismic data measured locally at the test mass. Furthermore, the formula is applied to seismic fields from stationary local sources. It is found that gravity gradients from these fields can be subtracted using local seismic measurements. The results are confirmed numerically with a finite-element simulation. A new seismic-array design is proposed that provides the additional information about the seismic field required to ensure applicability of the approach to realistic scenarios even with inhomogeneous rock and non-stationary local sources.
Educational Use Research
Learning Resource Type Article
Page Count 10


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