High Efficiency Gaseous Tracking Detector for Cosmic Muon Radiography

Figure 13

Mean signal amplitude for detector layers 2, 3, 4, and 5, relative to the first layer, after injection of ambient air to the gas flow, corresponding to 13000 ppm air contamination. The air was inserted from a bypass at into the second detector layer and flows along the gas line to the subsequent chambers. Predictions for the detectors, assuming full gas mixing (see the text for explanation), are indicated by the lines.