The prototype design of integrated base for PMT with pulse digitalization and readout electronics

摘要

High-speed pulse digitalization is critical for modern physics experiments with photomultiplier tubes (PMTs). This prototype design integrates the high-speed analogue to digital converter (ADC) for pulse digitalization, high voltage generator, high-speed buffer, synchronized clock, PoE (Power over Ethernet) power management andZYNQSoC (System on Chip) in a compact base which can be mounted with the PMT directly. There is only one category 5 Gigabit Ethernet cable needed for power, data and synchronized timing. This integrated design can be used to replace the conventional readout electronics system with PMTs which use the discrete or integrated pulse shaping circuit and FADC boards based on NIM or VME system. In the applications of several PMTs are used, or in the system where thousands of PMTs are deployed, this prototype design of integrated base for PMT has advantages to simplify the tremendous long distance analogue cables and high voltage cables. This paper presents the mechanical and hardware design, challenges and software design, the ENOB (effective number of bits) of ADC and the TCP data throughput of the Gigabit Ethernet will also be discussed. A scintillator neutron detector mounted with PMTs is connected to this prototype and spectrum analysis with the 137Cs source is performed to verify the system function; the preliminary results are also illustrated.