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In order to deal with the high multiplicities at HERA-B, the main tracking system is divided into two parts. These parts use different technologies and different geometries.
Tracks in a range from 10-100 mrad are in the acceptance of the Inner Tracker. The Inner Tracker covers the region from the inner border of the Outer Tracker up to a distance of 6 cm around the beam axis. The detector was designed and built by the Universities Heidelberg, Siegen and Zuerich. In this chapter the used technologies and the final setup of the detector will be presented.
The Outer Tracker covers tracks which are in the range up to 250 mrad. The size of the outer tracker is from 20 cm till 290 cm in the plane perpendicular to the Z-axis of the experiment. It consists of honeycomb drift chambers. 5 and 10 mm cells are used in the inner and outer region respectively.