[Clas12_rich] Report for RICH mirror 3 and 4 CMM measurements

[Giovanni Angelini]

Dear All,

I am writing about the radius of curvature: since we measured only the four sides of the mirror, I don’t  think we will extract a reasonable radius of curvature for the whole mirror. At least, it  will be the radius of curvature of the four edges, that will not be reliable as average radius of curvature of the whole mirror because the edges are always the point more “weird” since the cut of the mirror can apply micro deformation.

If I miss something about that, please be free to contact me.


Giovanni Angelini 




> Il giorno 11 ago 2016, alle ore 13:03, Tyler Lemon <tlemon at jlab.org> ha scritto:
> 
> Dear Jim,
> 
> Thank you for sending the CMM data. We do want the radius so we can compare it with our radius calculations. 
> 
> Best regards,
> Tyler
> 
> From: "Jim Dahlberg" <dahlberg at jlab.org>
> To: "Tyler Lemon" <tlemon at jlab.org>
> Cc: "Jacob Walker" <walkerj at jlab.org>, "clas12 rich" <clas12_rich at jlab.org>, "Patrizia Rossi" <rossi at jlab.org>
> Sent: Thursday, August 11, 2016 11:45:03 AM
> Subject: Re: Report for RICH mirror 3 and 4 CMM measurements
> 
> Here is the data from Matt, I was holding off to ask Matt if you wanted the radius's.
> Jim
> 
> ----- Original Message -----
> From: "Tyler Lemon" <tlemon at jlab.org>
> To: "Jim Dahlberg" <dahlberg at jlab.org>, "Jacob Walker" <walkerj at jlab.org>, "clas12 rich" <clas12_rich at jlab.org>
> Cc: "Patrizia Rossi" <rossi at jlab.org>
> Sent: Thursday, August 11, 2016 11:31:42 AM
> Subject: Report for RICH mirror 3 and 4 CMM measurements
> 
> Dear Matt and Jim, 
> 
> Could the report for the CMM measurements of RICH mirrors 3 and 4 be sent as soon as possible? As we mentioned after the measurements were done, it is critical that we are able to run our acceptance tests using the CMM measurements before the deadline for their acceptance, August 15. 
> 
> Best regards, 
> Tyler
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