  The \d0 (DZERO) Detector at Fermilab is currently collecting data since March
1, 2001, called Run 2. The detector has undergone an extensive upgrade to
participate in the Run 2 data taking. The design of the detector meets the
requirements of the high luminosity environment provided by the accelerator.
This paper describes the upgraded detector subsystems and gives an outline of
the physics potentials associated with the upgrade.
