[Dsg-rich] Reflectivity test stand dark box modified to fit RICH mirrors

[Marco Mirazita]

Hi Tyler,
thank you for this work.
Today I will be on skype in case you need to discuss anything about the 
measurements.
Marco



Il 2017-07-17 22:22 Tyler Lemon ha scritto:
> Hello,
> 
> Marc, Brian, Pablo, and I have modified the reflectivity test stand's
> dark box to make it taller. It is now big enough to allow RICH
> spherical mirrors to be tested.
> 
> We extended the vertical supports to make the dark box taller, used
> Tedlar/Mylar sheet and tape to cover the gaps caused by making the box
> taller, and added extra fabric to make it more light-tight. Attached
> is a picture of the taller dark box with the extra fabric.
> 
> Both photodiodes inside the taller dark box measure ~1 pA. This
> measurement is close what was measured before we modified the dark
> box.
> 
> We will continue tomorrow with the stability tests that Marco Mirazita
> recommended.
> 
> Best regards,
> 
> Tyler
> 
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