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User name posik
Log entry time 12:09:23 on March 01, 2009
Entry number 264044
This entry is a followup to: 263949
keyword=BB cer ADC shiftI think this shift has to do with the L1A. Figure one is the L1A for run 1907 which showed a large ADC shift in the BB cer, notice that there are nearly no events in the first 300e3 bbclockcnt. Figure 2 shows the L1A for run 1909 which shows some L1A in the first few clockcnts. I have also noticed this trend for other runs as well. For example runs 1912 and 1914 showed no shift in ADC and there L1A is shown in figure 3 and 4, notice the L1A is present in the first few clockcnts. Then run 1918 showed an adc shift, and it's L1A is in fig. 5, and the L1A are missing in the beginning. In addition to the ADC shifts I think this also causes decrease in the mwdc plots (fig 6). Does anyone know why we are missing these L1A? Is it an unstable beam issue?
A copy of this log entry has been emailed to: flay,Kalyan
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
