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BaBar Level 1 Drift Chamber Trigger Upgrade

Valerie Halyo
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Abstract

As PEP-II is exceeding the original design luminosity, BaBar is currently upgrading its Level 1 Drift Chamber Trigger (DCT) to reduce the rate of background Level 1 triggers by more than 50% while preserving the high Level 1 trigger physics efficiency. New Z-Pt-Discriminator VME boards (ZPD) utilizing the stereo hit information from the drift chamber are being built to extract the track z coordinate at the beam line with a resolution of a few centimeters.

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Valerie Halyo. 2002-09-23. BaBar Level 1 Drift Chamber Trigger Upgrade. https://arxiv.org/abs/hep-ex/0209063

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