[dsg-hallb_rich] [EXTERNAL] Re: d0 results for mirrors 5 and 5C

[Marco Mirazita]

Hi Tyler,
in your measurements you used an exposition time variable from 2 to 3.5 
ms, at least by reading the name of the files.
This is definitely bigger than the value of 0.5 ms we used for the 
RICH-1 mirrors.
I would ask you to repeat the measurement with 0.5 ms exposition time.
There could be also some issue with the alignment, since the image on 
the CCD seems to be moving with Z.
We can discuss about this point tomorrow at the meeting.
I have posted my slides for tomorrow on the RICH wiki if you want to 
have a look now.
Marco