Effective Dynamic Range in Measurements with Flash Analog-to-Digital Convertor

Physics – High Energy Physics – High Energy Physics - Experiment

Scientific paper

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19 pages, 1 table, 10 figures

Scientific paper

10.1016/S0168-9002(03)02020-5

Flash Analog to Digital Convertor (FADC) is frequently used in nuclear and particle physics experiments, often as the major component in big multi-channel systems. The large data volume makes the optimization of operating parameters necessary. This article reports a study of a method to extend the dynamic range of an 8-bit FADC from the nominal $\rm{2^8}$ value. By comparing the integrated pulse area with that of a reference profile, good energy reconstruction and event identification can be achieved on saturated events from CsI(Tl) crystal scintillators. The effective dynamic range can be extended by at least 4 more bits. The algorithm is generic and is expected to be applicable to other detector systems with FADC readout.

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