User name R. Michaels
Log entry time 05:49:25 on January27,2008
Entry number 227369
keyword=Locations of PREX detectorsShown in fig 1 are the X-Y of tracks for various cuts.
(X = dispersive, it's along the horizontal in the graphs).
top left plot = all tracks
top right plot = cut on thin PREX detector above pedestal.
bottom left plot = cut on thick (Stack) detector above ped.
The thin PREX detector has an unshielded PMT.
The thick one has two lead bricks shielding the PMT.
FIGURE 1
