Drift Chamber background plots
The plot shows the measured over the expected value for the overall
current in the Drift Chamber.
The calculation of the expected value (that takes into account the beam currents
and the luminosity)
is based on a background carachterization study made in
The color of the bin shows, as explained by the color code on the right,
how many times the value of the ratio was in that bin.
Also shown is the plot of the seconds per day during which the
data aquisition was paused because of the Drift Chamber
(that happens when there are trips or overcurrents).
For more information, see the DCH web page
last modified by Viola Sordini, April 19 2007