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CalTrackAngle < 0.1;  //Well Reconstructed Tracks
mipsPmtA() < 0.001 && mipsPmtB() < 0.001;  //Hit Tile Definition
CalTrackAngle < 0.1;  // Track Quality Selection

Tile 22

Looking at an individual tile in the center of the ACD, the statistics are too limited to draw any real conclusions. However, these plots hint hit tiles tend to have POCA with negative covariant distances while the unhit POCA tend to have positive covariant distances (as expected).

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An interesting feature in the CalTrackAngle suggests that some non-negligible number of events have their cluster direction antimis-aligned with the tracker track . Could we save these events?by 90 degrees. This comes from the fact that when a single crystal is hit in the calorimeter, the CAL axis is set to (0,0,0). When dotted into the TKR direction and taking the arccosine, you are left with 1.57...

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