[Clas12_rich] Mirror 5C-Autocad3D measurements

[Tomassini Sandro]

Hi Pablo,
thank you for the great work you have done.
I have some doubts concerning the curvature radius. The theoretical 
value is 2700 mm  the inner and 2725mm the outer. Looking at the 
measured points taken with the CMM machine seems that the measurements 
were concentrated on the edge mirror only with a few points in the 
central part of the back surface as you can see in the picture below. In 
this way the fit error might be large. Maybe some more points taken in 
the central part of the mirror might help to reduce the error in the 
curvature radius estimation.
Ciao
Sandro




Il 30/06/2016 23:12, Pablo Campero ha scritto:
> Hello,
>
> I looked at the Mirror-5C in Auto-CAD-3D, and I've generated all the 3D-points for the edges (See picture attached) to take the measurements and calculating the average thickness of the four sides; as you can see on the attached table.
> The mirror thickness average was 25.08[mm] with a SE of 0.81. Besides I calculated the radio sphere for this coordinates and it gave me a value of 2751.06[mm].
>
> Best Regards
> Pablo Campero
> Detector Support Group.
>
>
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> Clas12_rich at jlab.org
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-- 
-----------------------------------------
Dr. Eng. Sandro Tomassini
Istituto Nazionale di Fisica Nucleare
Laboratori Nazionali di Frascati
P.O.Box 13 00044 Frascati (RM) Italy
Tel. office: +39 06 9403 2919/8089
Fax: +39 06 94032256
e-mail: sandro.tomassini at lnf.infn.it
http://www.lnf.infn.it/
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