M. Taiuti et al., MEASUREMENT OF THE RESPONSE OF LONG PLASTIC SCINTILLATOR BARS FOR THELARGE-ANGLE ELECTROMAGNETIC SHOWER CALORIMETER FOR CLAS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 370(2-3), 1996, pp. 429-434
The behaviour of plastic scintillator bars with length up to 450 cm, d
esigned for the CLAS large angle electromagnetic shower calorimeter, i
s considered in relation to the overall calorimeter response function.
In particular methods adopted to measure the light emission yield and
transmission efficiency are described and the influence of the scinti
llator bar properties on the calorimeter energy read-out and timing is
discussed. We found that the new scintillator NE110A manufactured by
NE Technology Ltd. showed the best agreement with our demands. The eff
ect of wrapping materials on the scintillator bar properties has been
studied considering also the temperature variations expected in Hall B
at CEBAF.