Abstract
Small-sized Micro-Channel-Plate Photomultiplier Tube (MCP-PMT) has attracted extensive attention in the fields of high-energy physics, medical imaging and biological detection due to its high timing resolution. We report the R&D of a novel single anode MCP-PMT with ultrafast rise time (RT) and transit time spread (TTS), which is called fast-timing PMT (FPMT). In this paper, we mainly optimize the time performance of FPMT by simulation and experiments in three parts, including the gap distance between the MCP and anode, anode structure and high voltage distribution on the electrodes. The results show that by optimizing the anode structure of FPMT, the RT of single-anode FPMT is significantly improved from 1.4 ns to 215 ps and the TTS from 71 ps to 35.8 ps. By optimizing the high voltage distribution of the FPMT, the RT and the TTS are further improved, and the trend of the change in relative time performance with the change in high voltage distribution is analyzed. Finally, a single-anode FPMT with a RT of 153 ps and a TTS of 27.2 ps is realized.
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