Status of the D0 fiber tracker and preshower detectors

In this report we focus on the performance of the D0 central fiber tracker and preshower detectors during the high luminosity p p ¯ collisions at s = 1.96 GeV delivered by the Tevatron collider at Fermilab (Run IIb). Both fiber tracker and preshower detectors utilize a similar readout system based on high quantum efficiency solid state photo-detectors capable of converting light into electrical signals. We also give a brief description of the D0 detector and the central track trigger, and conclude with a summary on the central tracker performance.