Abstract
The central detector of the axial field spectrometer (AFS) is a cylindrical drift chamber using a “bicycle-wheel” geometry. It is design has been optimized for jet-like events with high track densities. This is accomplished through a high degree of azimuthal segmentation (4° sectors) with up to 42 space points per track, using measurements of drift time and charge division. Particle identification in the non-relativistic region is obtained by (d E/d x) sampling. The detector is operated in an inhomogeneous magnetic field at event rates of typically 5 × 10 5 collisions per second. Results will be presented on the detector performance after one year of operation at the ISR.
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