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arXiv · 2212.11514

Study on the linearity of 20" dynode and MCP PMTs

Diru Wu·Fengjiao Luo·Zhimin Wang·Min Li·Jilei Xu·Miao He·Changgen Yang·Yuekun Heng
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Abstract

The linearity of charge response is an important feature of photomultiplier tubes (PMT) for physics measurements, especially the newly developed 20" MCP-PMT. In this paper, in addition to the traditional method of double light sources, we applied another relative method of 20" PMT to 3" PMT to measure the linearity of the 20" dynode and MCP PMTs in pulse mode with a waveform digitizer. The measurements show a good linear response of 20" PMTs to 1,000 photoelectrons (p.e.). The correlations of the amplitude, rise-time, fall-time, FWHM, baseline recovery, overshoot, and late-pulse to the output charge of the 20" PMTs derived from the waveform analysis, where the MCP-PMT shows very different features compared to the dynode-PMT in particular.

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Diru Wu, Fengjiao Luo, Zhimin Wang, Min Li, Jilei Xu, Miao He, Changgen Yang, Yuekun Heng. 2022-12-22. Study on the linearity of 20" dynode and MCP PMTs. https://arxiv.org/abs/2212.11514

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