Speaker
Michelle Stancari
(Fermi National Accelerator Laboratory)
Description
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)
