New technologies in the DOe central tracker upgrade

The DOe collaboration has undertaken an aggressive upgrade of its central tracking system. The existing tracker will be completely removed and replaced by a 2 T superconducting solenoidal magnet, an 837000 channel silicon vertex system, an 80000 channel scintillating fiber tracker, followed by a 7680 channel central preshower detector and a 16000 channel forward preshower detector. In this paper we discuss all of the subsystems of the DOe central tracker upgrade, but emphasize those aspects which involve new technology: radiation hard scintillating fiber, VLPCs and extruded scintillating strips. (orig.)