Run15 VPDMB-5 trigger commission

 VPD slewing calibration table was implemented on Feb. 13. Three following runs were processed offline to check the Vz distribution and estimate the triggering purity within the HFT acceptance.

16045033   BBCx ~ 400kHz
16045043   BBCx ~ 800kHz
16045055   BBCx ~ 500kHz

  16045033 16045043 16045055
BBCx 400k 800k 500k
VzTPC vs VzVPD
VzTPC-VzVPD
VzTPC
sigma

Purity (ratio of |Vz|<5cm/ all )

7.4 +/- 0.3 cm

50%
 

7.7 +/- 0.2 cm

48%
 

7.9 +/- 0.3 cm

47%