American Physical Society

1953 Physics today  
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, w e 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-de ned thresholds. The system has reliably
more » ... as reliably protected the SVT from excessive radiation damage and has also served as a k ey diagnostic tool in understanding radiation backgrounds at PEP-II. Contributed to
doi:10.1063/1.3061216 fatcat:oicavxqjnnbwtbqisjimuzwwre