[Dsg-rich] Reflectivity tests for RICH spherical mirror 3

[Marco Mirazita]

Hi Tyler
thank you for these measurements.
I attached my analysis results.
By looking at photodiode A, it seems we can confirm the 2% uncertainty 
in the measurements.
Can you tell if the measured spots have visually good or bad coating?
Thank you,
Marco


Il 2017-07-26 17:48 Tyler Lemon ha scritto:
> Hello Marco Mirazita,
> 
> This morning Mindy and I took reflectivity measurements of RICH
> spherical mirror 3.
> 
> Attached are results for five spots on the mirror. For each spot, we
> took two measurement runs. Measurements 1 - 3 were taken with the
> mirror positioned horizontally. Measurements 4 and 5 were taken with
> the mirror positioned vertically. Also attached is a sketch of the
> mirror with approximate location of all measurements.
> 
> Just looking at the results, the reflectivity measurements for all
> spots are between 85% - 90% for wavelengths 430nm to 650nm.
> 
> Best regards,
> 
> Tyler
> 
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