Description: At BABAR, the Level 1 Drift Chamber trigger is being upgraded to reduce increasing background rates while the PEP-II luminosity keeps improving. This upgrade uses the drift time information and stereo wires in the drift chamber to perform a 3D track reconstruction that effectively rejects background events spread out along the beam line.
Date: November 29, 2005
Creator: Chai, X.D. & U., /Iowa
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Partner: UNT Libraries Government Documents Department