[Dsg-rich] Completed optical tests for RICH mirrors 3 and 5

Tyler Lemon tlemon at jlab.org
Thu Oct 20 15:38:28 EDT 2016


Dear Marco, 

We completed the optical tests for mirrors 3 and 5. Optical tests are complete for 6 of 10 mirrors. Only the central mirrors remain. 

Data from today's tests have been posted to the link below: 
https://www.jlab.org/Hall-B/secure/clas12/RICH/Mirrors/CMA/ 

D0 measurement results are: 
Mirror 3: 
measured d0 = 1.171 [mm] at z = 57 [mm] 
fit d0 = 1.219 [mm] at z = 56.478 [mm] 
R = 2705.82 [mm] 

Mirror 5: 
measured d0 = 1.409 [mm] at z = 57.5 [mm] 
fit d0 = 1.490 [mm] at z = 57.90 [mm] 
R = 2704.40 [mm] 

We will continue optical tests tomorrow. 

Best regards, 
Tyler 

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