I installed a mockup PMT for the readout of the cerenkov light at the ends
of the V shaped cerenlov bar.
I'm assuming that the real PMT tube will cover the bar end and the diameter of the 
active photocathode area is 5*mm smaller than the outer glass tube diameter. 
Sinve the real PMT is round but the covered area is given by the rectangular shape of the bar end, I have
defined this rectangular mockup PMT. With this mockup design I'm avoiding hits on the PMT photocathde
which did not came directly from the cerenkov bar ends (e.g. other light leakage).
I'm assuming that in reality the uncovered PMT areas will not be used. 


orange: V shaped cerenkov detector
At the bar end, grey: mockup for the PMT entrance window (glass, thickness = 0.5*mm, length = 160*mm)
At the bar end, blue: mockup for the PMT photocathode    (covered active area, thickness = 0.1*mm, length = 155*mm)

In thhe background you see the single VDC
.