The readout of scintillating fibers using Silicon APDs and Metal-Resistive-
Semiconductor (MRS) devices was investigated in a large temperature range d
own to - 150 degrees C in the laboratory and at an electron beam. In compar
ison to conventional PMs with bialkali cathodes an improved efficiency was
found for low right signals from blue and green scintillating fibers of 0.5
mm diameter. (C) 2000 Elsevier Science B.V. All rights reserved.