Development of a Scintillatring Fibre Detector for HERA-B

TL;DR

This paper reports the development and testing of a high-rate, radiation-tolerant scintillating fibre detector for the HERA-B spectrometer, including measurements of light output and transport under radiation exposure.

Contribution

It introduces a new scintillating fibre detector design with multianode PM readout suitable for high-rate, high-radiation environments near the beampipe.

Findings

Successful operation at particle rates up to 2*10^4 mm^{-2} s^{-1}

Demonstrated radiation tolerance up to 1 Mrad/y

Measured light transport efficiency under various irradiation conditions

Abstract

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.