The Hermes Recoil Detector

The HERMES collaboration at HERA is constructing a new detector system to greatly expand the experiment's tracking and identification capability for particles scattered at large angles. The detector is specifically designed to detect the recoil protons from exclusive processes and reject background from competing channels. The recoil detector system consists of a double layer silicon microstrip detector used as a ΔE-E telescope, a scintillating fibre tracker based magnetic spectrometer, and a three layer tungsten scintillator sampling calorimeter. The construction of the individual detector components is now finished and test beam studies are underway. Final assembly of the detector will be completed in Winter 2004/2005 and the detector will be installed in the HERMES experiment in Summer 2005.