[Dsg-rich] Optical tests complete for RICH mirrors 2C, 3C, 4C

[Marco Mirazita]

Hi Tyler,
thank you for the update.
Once all the mirrors are completed, it would be interesting to compare 
the radii measured from the D0 and the ones obtained from your fit of 
the CMM data.
Even if the CMM data tested only the edges of the mirrors, they should 
not be too different from the D0.
Best regards,
Marco



Il 2016-10-25 18:00 Tyler Lemon ha scritto:
> Dear Marco,
> 
> We have completed the optical tests for mirrors 2C, 3C, and 4C.
> Optical tests are complete for 9 of 10 mirrors. Only mirror 5C
> remains.
> 
> Data from the tests have been uploaded to:
> 
> https://www.jlab.org/Hall-B/secure/clas12/RICH/Mirrors/CMA/
> 
> As was mentioned in the RICH weekly meeting last Friday, October 23,
> 2016, we also took d0 measurements for mirror 2C with the mirror in
> the vertical, 90 degree rotation position on the mirror stand. All
> other mirrors were just measured in the horizontal position. The d0
> measurement results for mirrors 2C, 3C, and 4C are below.
> 
> Mirror 2C:
> 
>  Horizontal Position:
> 
>  measured d0 = 1.190mm at z = 56.5mm
> 
>  fit d0 = 1.34mm at z = 56.48mm
> 
>  R = 2705.83
> 
>  Vertical Position:
> 
>  measured d0 = 1.211mm at z = 61.5mm
> 
>  fit d0 = 1.358mm at z = 61.69mm
> 
>  R = 2700.62mm
> 
> Mirror 3C:
> 
>  measured d0 = 1.290mm at z = 60.5mm
> 
>  fit d0 at 1.402mm at z = 60.42mm
> 
>  R = 2701.88mm
> 
> Mirror 4C:
> 
>  measured d0 = 1.390mm at z = 61mm
> 
>  fit d0 = 1.460mm at z = 61.09mm
> 
>  R = 2701.21mm
> 
> For the upcoming tests for mirror 5C, should we also measure d0 with
> the mirror in the vertical position? Please let us know.
> 
> We will continue the optical tests tomorrow.
> 
> Best regards,
> 
> Tyler