The light collection of several fiber configurations embedded in a box-shaped plastic scintillating counter was studied by scanning with minimum ionizing electrons. The light was read out by silicon photomultipliers at both ends. The light yield produced by the 855-MeV beam of the Mainz Microtron showed a strong dependence on the transverse distance from the beam position to the fibers. The observations were modeled by attributing the collection of indirect light inside of the counter and of direct light reaching a fiber to the total light yield. The light collection with fibers was compared to that of a scintillating counter without fibers. These studies were carried out within the development of plastic scintillating detectors as an active veto system for the DarkMESA electron beam-dump experiment that will search for light dark matter particles in the MeV mass range.
@article{arxiv.2101.06122,
title = {Electron beam studies of light collection in a scintillating counter with embedded fibers},
author = {M. Lauß and P. Achenbach and S. Aulenbacher and M. Ball and I. Beltschikow and M. Biroth and P. Brand and S. Caiazza and M. Christmann and O. Corell and A. Denig and L. Doria and P. Drexler and J. Geimer and P. Gülker and T. Kolar and W. Lauth and M. Littich and M. Lupberger and S. Lunkenheimer and D. Markus and M. Mauch and H. Merkel and M. Mihovilovič and J. Müller and B. S. Schlimme and C. Sfienti and S. Širca and S. Stengel and C. Szyszka and S. Vestrick},
journal= {arXiv preprint arXiv:2101.06122},
year = {2021}
}