PrimEx Pair Spectrometer Front/Back paddle correlation

The plots below were produced from the file primex04596.dat.05. They plot channel number vs. channel number for the HARDWARE bank for rocid=15, slot=10. This is the TDC module containing all of the PS TDCs.

The PS Front counters occupy channels 28-31 and channels 64-75 (X-axis)

The PS Back counters occupy channels 80-95 (Y-axis).

The only cut was that the hits were within 400 TDC channels (200ns) of one another.

The larger boxes indicate a correlation between front counter (X-axis) and back counters (Y-axis)
This shows the coincidences for the 4 PS Front paddles plugged into channels 28-31.
This shows the coincidences for the 12 PS Front paddles plugged into channels 64-75.