[Clas12_rich] RICH Mirror C3 corners not in same plane

[Tyler Lemon]

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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