[Clas12_rich] CMM for measuring RICH mirrors during week of 6/13/2016

[James Dahlberg]

Looks like the 16th would be fine. Sounds like you would really like for 
the DSG to perform these measurements.  After everything is set up and 
calibrated, a person could be trained fairly quickly to operate the CMM 
arm and take the measurements.  One of our guys would have to calibrate 
and run the software.  With our ~ 30um CMM, they would be measured in 
one setup.  What accuracy do you need and is it just the radius you need 
or a detailed profile.  Also, just to be sure, the surface can be 
touched with a probe, correct?
Jim

On 6/8/2016 8:40 AM, Tyler Lemon wrote:
> Dear Chris and Jim,
>
> Would the 60 um CMM be available for measuring the RICH mirrors some time Tuesday June 14 through Friday June 17?
>
> As mentioned in my previous email on 5/25, there would be four, square spherical-mirror segments with the largest being about 840mm by 530mm with a radius of curvature of 2.71 meters.
>
> Would the CMM be able to take measurements of the entire mirror segment without having to be reset? Also, who would perform the measurements? Could the DSG use the CMM or would Survey Group have to perform the measurements? Please let us know.
>
> Best regards,
> Tyler Lemon
> Detector Support Group
>