Typical Histograms

Wire occupancy histograms give four variations on the typical histogram. All histograms have the majority of their wire hits located in the central section due to the focusing effects of the magnet. DC wire planes see a difference between the upstream and downstream sections of the detector due to the presence of muons in the upstream half. In both of Figures 1 and 2 the occupancy curves peak at wire 40 (the detector centre). The upstream plane has a less uniform curve caused by greater amounts of cross talk between the wires in a plane due to the high ionizing capabilities of the muon. Figure 3   shows results from a multiplexed PC plane. Wire multiplexing is evident as the outer wires only have information in every fourth bin. The typical histogram for a central PC plane is shown in Figure 4   and relays that fact that only the central 46 wires in these planes are instrumented.