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Annealing studies with the CDF Run II Silicon Vertex Detector

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Beurs van Berlage

Beurs van Berlage

Poster Sensors: 1b) Semiconductor Detectors


Michelle Stancari (Fermi National Accelerator Laboratory)


Between Run II commissioning in early 2001 and the end of operations in September 2011, the Tevatron collider delivered 12 inverse femtobarns of proton-antiproton collisions to the Collider Detector at Fermilab (CDF). During that time, the CDF silicon vertex detector was subject to radiation doses of up to 12 Mrad. After the end of operations, the silicon detector was annealed for 24 days at 18 degrees celsius. A method for monitoring the bias current and depletion voltage of the sensors during the annealing period was developed, and the measured time evolution of these quantities during annealing is in agreement with expectations from the Hamburg model. This monitoring method has the potential to alert today's experiments when the beneficial effects of annealing, that happen on short time scales, are complete and allow them to stop the annealing process before the harmful or reverse annealing effects, that happen on longer time scales, become significant.

Primary author

Michelle Stancari (Fermi National Accelerator Laboratory)

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