Digital Coincidence Doppler Broadening setup at FEI STU

A digital data read-out system for coincidence Doppler-broadening spectroscopy (CDB) is presented. Traditional CDB setups are based on shaping amplifiers and multi parameter MCA. We replaced them by 14 bits data acquisition card (DAQ). Replacing multi-parameter MCA by DAQ was realized also by several groups before, but in our setup the signal shaping tasks are performed digitally by software in a PC. Signals from HPGe detectors are sampled at preamplifier outputs. Pulse shaping is realized by trapezoidal filter.