  A fibre detector with multianode PM readout for high rate applications was
developed for the HERA-B spectometer to cover the area near the beampipe. Such
a detector has to operate at particle rates up to 2*10**4 mm**(-2) s**(-1) and
has to tolerate a radiation dosis up to 1 Mrad/y. The light output of test
detectors with different scintillating fibres was measured as well as the light
transport through clear fibres to the PM as a function of radiation dosis and
different conditions of irradiation. The geometry of the detector is described
and results for a full size prototype are presented.
