First Measurements of High Frequency Cross-Spectra from a Pair of Large Michelson Interferometers
Name
PhysRevLett.117.111102.pdf
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696.23 KB
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Checksum (MD5)
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Author(s)
Chou, Aaron S.
Gustafson, Richard
Hogan, Craig
Kamai, Brittany
Kwon, Ohkyung
Meyer, Stephan S.
Richardson, Jonathan
Stoughton, Chris
Tomlin, Raymond
Waldman, Samuel
Date Issued
September 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Chou, Aaron S. et al. “First Measurements of High Frequency Cross-Spectra from a Pair of Large Michelson Interferometers.” Physical Review Letters 117.11 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
Measurements are reported of the cross-correlation of spectra of differential position signals from the Fermilab Holometer, a pair of colocated 39 m long, high power Michelson interferometers with flat broadband frequency response in the MHz range. The instrument obtains sensitivity to high frequency correlated signals far exceeding any previous measurement in a broad frequency band extending beyond the 3.8 MHz inverse light-crossing time of the apparatus. The dominant but uncorrelated shot noise is averaged down over 2×10[superscript 8] independent spectral measurements with 381 Hz frequency resolution to obtain 2.1×10[superscript −20]m/√Hz sensitivity to stationary signals. For signal bandwidths Δf > 11 kHz, the sensitivity to strain h or shear power spectral density of classical or exotic origin surpasses a milestone PSD[subscript δh]
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.117.111102
