The bhabhas counted by the 120 hertz luminosity time history are
those triggers for which
- there is an acceptable beamstrahlung signal
- the energy veto (too many towers lit in the calorimter) has
not fired
- the energy in both ends of the lum is less than 72 GEV (i.e., 72
counts in the 120 hertz data; this energy scale is only approximate).
The sample for these two plots is the set of bhabha triggers satisfying
the first two conditions (bhabha candidates).
To satisfy the third condition, the trigger
must fall to the left of 72 in the first plot. A typical bhabha has
energies of about 30-35 GEV in each end of the luminosity monitor.
See
also Trigger Correlations for counts of
those bhabha candidates meeting or failing to meet the energy cut.
To change accumulation type, click on the top line of text
(typically with mouse-button 3) to bring up a pop-up menu.
These histograms brought to you courtesy of
Java Analysis Studio.
More 120 Hertz Statistics
Trigger Statistics
Trigger Correlations
Pol Bit Statistics
Toroid (Beam Current) Statistics
Beamstrahlung Monitor Statistics
Back to 120 Hertz Index
Joanne Bogart
Last modified: 21 May 1998