SCATTERED LIGHT CONTROL in ADVANCED LIGO Michael Smith LIGO Laboratory Caltech, Pasadena, CA

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Advanced LIGO 1 SCATTERED LIGHT CONTROL in ADVANCED LIGO Michael Smith LIGO Laboratory Caltech, Pasadena, CA
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    18-Jan-2016
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SCATTERED LIGHT CONTROL in ADVANCED LIGO Michael Smith LIGO Laboratory Caltech, Pasadena, CA. Scattered Light Displacement Noise Theory. Min Gravity Wave Signal. Scattered Light. Noise. Phase Shift due to motion of surface. Requirement:. Stray Light Design Requirement. - PowerPoint PPT Presentation

Transcript of SCATTERED LIGHT CONTROL in ADVANCED LIGO Michael Smith LIGO Laboratory Caltech, Pasadena, CA

No Slide Titleof surface
LIGO II
Sources Are Random, Add in Quadrature
Scattered Light Transfer functions
Bidirectional Scatter Distribution Function of scattering surface, BRDF, sr^-1
Solid angle subtended by the mode inside IFO arm, sr
Relative area ratio of IFO mode area to the area of incident beam waist
Transmissivity of optical path from scatter surface to the injection point
LIGO II
Dust particles scattering light on the sample surface!
LIGO II
LIGO II
Modeling with ZEMAX:
beam splitter chamber—ghost beams from internal reflections in the wedged compensation plate next to Input Test Mass (ITM)
BS
elliptical
baffle
1.00E-05
1.00E-04
1.00E-03
1.00E-02
1.00E-01
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