DIRC, a New Type of Particle Identification System for BABAR

Details DIRC, a New Type of Particle Identification System for BABAR DIRC, a New Type of Particle Identification System for BABAR

1997-12-12

arxiv.org/abs/hep-ex/9712018v1

Nucl.Instrum.Meth. A408 (1998) 211-220

Physics

High Energy Physics

High Energy Physics - Experiment

Invited talk given at the 5th international workshop on B-Physics at hadron machines (Beauty'97), Santa Monica, California, US

Scientific paper

The DIRC, a new type of Cherenkov imaging device, has been selected as the primary particle identification system for the BABAR detector at the asymmetric B-factory, PEP-II. It is based on total internal reflection and uses long, rectangular bars made from synthetic fused silica as Cherenkov radiators and light guides. In this paper, the principles of the DIRC ring imaging Cherenkov technique are explained and results from the prototype program are presented. The studies of the optical properties and radiation hardness of the quartz radiators are described, followed by a discussion of the detector design.

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