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User name D. Parno
Log entry time 14:31:41 on February 23, 2009
Entry number 262901
keyword=Syncroc studies: L1A vs Clock for Run 1603Run 1603 was taken during the swing shift on 19 Feb. Fig. 1 shows the ROC synchronizations for the first 50,000 events, including a short gap early in the run. Fig. 2 shows L1A:clockcnt for the first 1,000,000 events.
In Fig. 2, we note that the two big structures -- where L1A drops all the
way to zero -- probably represent beam trips. Otherwise, the line is flat
except for one point at the very beginning of the run (which could simply
show the beam ramping up after a trip) and some glitches after clockcount
= 400x10^3. That latter glitch happens too late in the run to account for
the glitch in the syncroc plots (which include only the first 50,000 events)
A copy of this log entry has been emailed to: brads, kalyan, flay, posik, moffit
Figure 1
Figure 2
