Log entry time 20:27:01 on February 17, 2011

Entry number 347388

This entry is a followup to: 347379

Followups:

• 347405 02/17/11 22:58 yez L-HRS: I post some real graphics for better observation

As mentioned, I looked at a run from early Saturday, #1189.

The first attached image is from S1, the second is from S2, and the third
is from the Cerenkov. In all three, you can see the TDC plot in the
lower-left corner, with a large peak at channel 0 and another around
channel 1500.

The first plot in each set is the ADC plot, while the one in the
upper-right with a cut that should remove the pedestal. The one in the
lower-right has a cut to eliminate the second peak seen in the TDC.

Note that in the plot with the "pedestal cut", the overall shape of the
graph remains much the same, but the event count drops drastically.

Please note that this behavior persists in the S1, the S2, and the
Cerenkov, suggesting that the problem is not a hardware issue, but
something related to the analyzer.

Figure 1

Figure 2

Figure 3