LIGO Document T1400717-v5

Profiles of ETM11 and ETM14, latest ETM coating by LMA

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Document type:
T - Technical notes
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14 Nov 2014, 06:21
The pair of ETMs coated by LMA has been delivered to Caltech and has been measured by LIGO. Characteristics of those mirrors have been studied. Overall, their performance is better than previous coatings. The spiral patterns are down by 2~4. The pair seems to degrade the CD, but the effect is tolerable.
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Notes and Changes:
Extensive comparison of PSDs before and after coating is added

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