Performance of Scintillator Counters with Silicon Photomultiplier Readout

physics.ins-det

/ Authors

Mu2e Collaboration Cosmic Ray Veto Group, A. Artikov, V. Baranov, D. Chokheli, Yu. I. Davydov, E. C. Dukes, R. Ehrlich, K. Francis, M. J. Frank, V. Glagolev

and 8 more authors

R. C. Group, S. Hansen, A. Hocker, Y. Oksuzian, P. Rubinov, E. Song, S. Uzunyan, Y. Wu

/ Abstract

The performance of scintillator counters with embedded wavelength-shifting fibers has been measured in the Fermilab Meson Test Beam Facility using 120 GeV protons. The counters were extruded with a titanium dioxide surface coating and two channels for fibers at the Fermilab NICADD facility. Each fiber end is read out by a 2*2 mm^2 silicon photomultiplier. The signals were amplified and digitized by a custom-made front-end electronics board. Combinations of 5*2 cm^2 and 6*2 cm^2 extrusion profiles with 1.4 and 1.8 mm diameter fibers were tested. The design is intended for the cosmic-ray veto detector for the Mu2e experiment at Fermilab. The light yield as a function of the transverse and longitudinal position of the beam will be given.