The HERMES recoil detector: a combined silicon strip and scintillating fibre detector for tracking and particle identification

The study of hard exclusive processes at the HERMES experiment at DESY requires a recoil detector surrounding the internal gas target. It consists of a silicon strip detector inside the beam vaccum, a scintillating fibre tracker in a 1 T solenoidal field and a tungsten-scintillator sandwich detector for photon detection. This recoil detector will improve the selection of exclusive events by a direct measurement of the recoiling particle as well as by rejecting non-exclusive background events.