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In this section I assume that each strip detector panel has a random small rotation as it is glued onto the cage.
With the panels thus jumbled, I did a run and found that the vertex-finding efficiency had dropped to 73%.
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This plot summarizes the vertex-finding efficiency as a function of the maximum random panel rotation. Dotted lines indicate a 5% and 10% losses in efficiency, for rotation tolerances of 0.21 and 0.42 degrees, respectively. |