  The CDF Run II silicon detector is the largest operating detector of its kind
in High Energy Physics, collecting p-pbar collision data at the Fermilab
Tevatron since 2001. It provides precision tracking and vertexing which played
a critical role in the B_s mixing discovery and is essential to the ongoing
Higgs Boson search and many other physics analyses carried out at CDF. Due to
the prolonged Tevatron Run II program the detector faces unforeseen challenges
while operating well beyond its design parameters. Of particular concern is the
radiation aging of the silicon sensors which are expected to acquire ~10 fb^-1
data, far above their design integrated luminosity of 2-3 fb^-1. In this paper
we discuss the impact of radiation damage to the sensors, their effect on the
physics performance and expectations for future operations of the two inner
layers, which have already inverted.
