The analysis of data obtained with time to amplitude converter and multichannel analyser systems

An exact general formula is derived relating the data obtained from t.a.c-m.c.a. systems to the input signal distribution; it is shown how the latter is modified by the measuring process. A general method of data correction is given, together with important approximations, which evaluates the input signal distribution from the data without any loss of signal. A simple and accurate method of system calibration based only on counting and not requiring the use of calibrated delay lines is also given. Paper G6 presented at 3rd Internat'l Conf. Positron Annihilation, Otaniemi, Finland (August 1973).