User name choi
Log entry time 12:40:44 on May 5,2003
Entry number 100140
keyword=Right Arm Cerenkov analysisThe attached plot shows the analysis of right arm cerenkov for a few tubes. Top two panels show the cerenkov output for tube #3. Red curves are when only mirror #3 were fired and blue curves are when two mirrors were fired including #3. In general, blue curves should show clear 1 photo-electron peak, which is not visible in this case. The bottom two panel shows examples of good working case, for tube #4 (bottom left) and tube #5 (bottom right). It seems that with low HV on tube #3, one photo electron peak is smeared into pedestal. We do need to increas HV for tube #3.
FIGURE 1
