User name R. Michaels
Log entry time 12:28:35 on October 1,2000
Entry number 48898
keyword=online results of deadtime scanI added plots of the electronics deadtime to hana, and I fixed
the DAQ deadtime plots. Below are the results of the current
scan done earlier today. The relative error in the EDT depends
on the EDT and how many events. For example, if one has 7
scaler updates (which are 8 sec intervals) the relative error for
EDT=2% is 30%, i.e. EDT = 0.02 +/- 0.006. For a 1hour run
we can measure EDT to 4% (relative) if EDT=2%.
.................................Left Spectr...............Right Spectr
Run.....Current.....Strobe.......EDT......Strobe......EDT
.............................(kHz)......(fraction)...(kHz).....(fraction)
.......................................(typ EDT error +/- 0.008)
1221......5..............75...........0.02...........68...........0.012
1223.....10.............161.........0.025.........145.........0.017
1224.....20.............330.........0.05...........300.........0.04.....see PLOTS below
1226.....40.............635.........0.12...........560.........0.08
1227.....50.............780.........0.13...........679.........0.13
Below is a plot for run 1224, analyzing 200K events:
FIGURE 1
FIGURE 2
