PIN Photodiodes for Radiation Monitoring and Protection in the BaBar Silicon Vertex Tracker

Details PIN Photodiodes for Radiation Monitoring and Protection in the BaBar Silicon Vertex Tracker PIN Photodiodes for Radiation Monitoring and Protection in the BaBar Silicon Vertex Tracker

2000-10-23

arxiv.org/abs/hep-ex/0010058v1

Int.J.Mod.Phys. A16S1C (2001) 1084-1086

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 2 PostScript figures

Scientific paper

We discuss the design, implementation and performance of the radiation monitoring and protection system used by the Silicon Vertex Tracker (SVT) in the BaBar detector. Using 12 reverse-biased PIN photodiodes mounted around the beampipe near the IP, we are able to provide instantaneous radiation dose rates, absorbed dose integrals, and active protection that aborts the circulating beams in the PEP-II storage ring when radiation levels exceed user-defined thresholds. The system has reliably protected the SVT from excessive radiation damage and has also served as a key diagnostic tool in understanding radiation backgrounds at PEP-II.

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