[Clas12_rich] Mirror 5C-Autocad3D measurements

[Brian Eng]

Doing a least squares fit I get pretty much the same numbers for mirror 5C as the survey group did. All the numbers are in units of mm.

Back surface sphere radius: 2735.65632782 with RMS of 0.0891485148111
Sphere center: 1757.05061408, -1419.56605411, -0.169281068618

Mirror surface sphere radius: 2696.26510045 with RMS of 0.0696200623859
Sphere center: 1746.89907226, -1410.89622076, -0.0705877320044

It should be noted that their calculated center points are off about ~10 in X,Y which might explain getting a difference of ~35 instead of the expected 25.

I've put the code and data file (the same as the one Jim sent) here if anyone wants to mess with it.

https://userweb.jlab.org/~beng/RICH/

It isn't very elegant, but it should be fairly obvious what it is doing.

> On Jul 1, 2016, at 3:48 PM, Tomassini Sandro <sandro.tomassini at lnf.infn.it> wrote:
> 
> Hi Pablo
> 
> Thanks for your analisys. As you can see the outer radius is smaller than the inner one...
> It should happen the contrary.
> Next time we should distribute better the measured points on the mirror surface.
> Have a nice weekend
> Sandro
> 
> Dr Eng. S. Tomassini
> 
> Il 01/lug/2016 21:13 Pablo Campero <campero at jlab.org> ha scritto:
>> 
>> Hello Sandro, 
>> I took your suggestion and I made the calculations of the radius for the inner and outer surfaces, I took more points (21). It looks better now. The results that I got were: 
>> -Mirror Surface (Inner): <2694>±81[mm] 
>> -Back surface(Outer): <2678>±73[mm] 
>> -For both surfaces the St.DEV. is ~3% of the average. 
>> 
>> Both values cover the theoretical specs. I propose in the future, if is necessary; a program .can be written to take all combinations (32*32*21*21=451584) of the measurements. 
>> Have a nice weekend.    
>>    
>> 
>> Best Regards 
>> Pablo Campero 
>> Detector Support Group. 
> 
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