User name saw
Log entry time 19:12:10 on January 9,2005
Entry number 138746
This entry is a followup to: 138739
keyword=Before and afterThe two figures are the TDC for EL8 for runs 1604 and 1615. (Before and after the timing change) The left peak is T3 triggers while the small peak to the right is T6: self timing. The change in the gate timing has shifted both peaks to the right, the T3 (coincident protons) peak by 500 channels (~17 ns) and the T6 peak by 270 channels.
The fact that the two peaks did not move by the same amount makes sense. Part of the change in gate time, the 12 ns taken out of the TDC gate should affect both peaks, while the 8ns taken out of T3 will only move the coincident proton peak.
Because there is a comfortable shoulder to the left of the coincident proton peak, we can be confident that high momentum protons for upcoming kinematics will still be in range.
FIGURE 1
FIGURE 2
