Advanced LIGO COC - Test Results

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Web page contact: 
GariLynn Billingsley
email:
Billingsley_G "at"
ligo.caltech.edu

 Also see test reports at  

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Scatter Characterization



Coating Development 

Q measurements and results
       MIT      Glasgow

Test substrate ilog


Cleaning

T050055-00  Advanced LIGO Coating - Cleaning tests



Sapphire Homogeneity Results
Summary of CSIRO measurements of 15 cm dia sapphire pieces
Summary of CIT measurements of 25 cm dia sapphire piece
Sapphire Axes - picture of the relative angles and faces

Light polarized parallel to the c-axis of the material experinces less inhomogeneity than perpendicular, when propogating through a or m-axis material.

Other LIGO 1 homogeneity measurements of fused silica (for comparison)



Sapphire Polishing Results
Picture of CSIRO measurements of 15 cm dia sapphire pieces
Metrology report of CSIRO polishing of 1st 15 cm dia substrate