Systematic noise projection

The GEO600 team has developed systematic noise projection techniques.

These are based on measured coupling transfer functions and provide a quantitative framework for commissioning and sensitivity optimization of the detector.

Three-paneled diagram showing functions as colored graphs in logarithmic plots. — Results of simulation of a split-path feedback loop. Left: open loop gain of the slow and fast paths, and full loop. Right: amplitude spectral densities of the noise projections, the detector output and the loop-noise upper limits

Results of simulation of a split-path feedback loop. Left: open loop gain of the slow and fast paths, and full loop. Right: amplitude spectral densities of the noise projections, the detector output and the loop-noise upper limits

Relevant publications

Smith, J. R.; Ajith, J. R.; Grote, H.; Hewitson, M.; Hild, S.; Lück, H.; Strain, K. A.; Willke, B.; Hough, J.; Danzmann, K.: Linear projection of technical noise for interferometric gravitational-wave detectors. Classical and Quantum Gravity 23 (2), pp. 527 - 537 (2006)

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Systematic noise projection

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