An approach to light distribution for the calibration of high energy physics calorimeters

In high energy physics experiments, calorimeters are calibrated to produce precise andaccurate results. Laser light can be used for calibration when the detectors are sensitive to photonsin that particular energy range, which is often the case. Moreover, it is not unusual that detectionsystems consist of hundreds of channels that have to be calibrated independently, which producestringent requirements on the light distribution system in terms of temporal and spatial stability,energy distribution and timing. Furthermore, the economic factor and the ease of production haveto be taken into account. We present a prototype light distribution system, based on a series ofoptical beamsplitters, developed for the Muon g-2 experiment at Fermilab