CDF Run-II Silicon Detector: Operations and Aging

The CDF Run-II silicon microstrip detector has seen almost 12 fb-1 of proton-antiproton collisions over the last 10 years. It has shown remarkable performance, with 80% of its channels still operating error-free, and only one of its eight layers approaching the operational limits for full depletion. The measured depletion voltage and signal-to-noise ratio of these sensors give unique information about the behavior of sensors irradiated slowly over a long period of time. Data from heavily irradiated, double-sided sensors excludes a monotonic electric field inside the sensor and is instead consistent with a doubly-peaked field that is lower in the center of the sensor and higher at the edges.