Speaker
Alexandre Pronko
(FNAL)
Description
The CDF silicon vertex detector is one of the largest operating silicon
detectors in particle physics. Its silicon sensors have 722,432 channels read
out by 5,456 chips and cover an area of 6 m 2. The detector is used for
precision tracking and in the hardware trigger for events with a displaced
vertex. It is very important for a success of the CDF physics program. The
silicon detector has played a critical role in the first measurement of the B s
mixing. This presentation includes a brief review of the detector performance
and mainly focuses on issues of longevity and effects of radiation damage.
This is of particular importance as the CDF experiment will be operating until
the end of Tevatron Run II in 2009, with an expected integrated luminosity
of 5–8 fb −1, which exceeds the initial design goal for the detector to be
radiation hard for operation with a delivered luminosity of up to 3 fb −1. We
present a detailed analysis of the time evolution of bias currents, depletion
voltages, and signal-to-noise ratios, which indicate that the CDF silicon
detector should outlast Run II without major degradation of performance.
Author
Alexandre Pronko
(FNAL)
