[Clas12_rich] RICH Mirror C3 corners not in same plane

[Tomassini Sandro]

Hi Tyler,
it is correct. The points ABCD are not on the same plane.
Only the lateral side are planar surfaces.
Best regards
Sandro

Il 03/08/2016 23:22, Tyler Lemon ha scritto:
> Dear Marco Mirazita,
>
> We have been looking at mirror C3 and are still having problems with 
> the corners of the ideal model being non-coplanar. We have looked at 
> the data in NX 9 and AutoCAD and in both we see one corner not lying 
> in the plane created by the other three. Attached is an image 
> generated in NX 9 showing this. The plane was created using corners A, 
> B, and C and you can see corner D is above the plane. We see a similar 
> thing in AutoCAD.
>
> I have also taken your advice in the email from this morning and 
> checked the cross product of the two diagonals with each side. From 
> this, we do not get that the corners of mirrors C3 and C4 are 
> coplanar. However, we do see that mirrors C2 and C5 have coplanar 
> corners. We are very puzzled by this. Do you have any idea why this 
> is? The only thing that we can think of is that the step models for C3 
> and C4 are somehow incorrect when we import them. Could you please 
> send us the raw model files and also just the coordinates for the 
> corners that you used for your calculations? Thank you in advance.
>
> Also, by the way, I sent an email to Walt Akers today to ask of any 
> progress on the space layout of EEL 124 to ensure that there will be 
> adequate space for the RICH assembly and testing. I will send his 
> reply and the model for the area with the mailing list when I get it.
>
> Best regards,
> Tyler
>
>
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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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