Bruce, thanks for the
plots.
I note several
features.
There are frequent
spikes (fast large deviations from the mean). Is the source
understood? I note that the effect also occurs in the pedestal run, does
this mean that it is probably not a VPT effect?
There is a clear time
dependence in the response of many of the tubes. Most notably a rapid fall
at the start of the run. Presumably this is even after the first N(?)00
events have been discarded?
However, there are also
longer term drifts in a couple of cases. Is this
understood?
How do these runs fit
in with the other runs. Is the slow run before or after? What is the
time interval between runs?
Bob.
From: Kennedy, BW (Bruce)
Sent: 23 November 2007 15:34
To: Brown, RM (Bob) - PPD
Subject: Rate effect - standard rate
ddata
Bob,
Here are the standard-rate plots
corresponding to the reduced-rate version you already have. The vertical
stripes which you see in the plots are a PAW artefact, not a feature of the
data.
Bruce
--
============================================
Bruce Kennedy
Particle Physics Department,
Rutherford Appleton Laboratory
Phone: (0)1235
445075 Email:
B.W.Kennedy@rl.ac.uk