The detector is composed of two stacked scintillating panels, each approximately 0.75m x 3m and 200lb
Each panel has a Photo-Multiplier Tube on each end. The two PMT's are wired into a junction box for each panel.
The two junction boxes are wired into a QuarkNet DAQ board, which is interfaced to a computer running Linux.
In addition, small scintillator paddles of known efficiency have been placed above and below the detector to monitor the efficiency of each large panel.
A more in depth description of the DAQ board and software is available in the Technical section.