Long-delayed afterpulses peaking near 260 μs (dynode) and 90/550 μs (MCP), at yields of 10^-3 per primary photoelectron, were measured in JUNO 20-inch PMTs out to 20 ms.
Study on the linearity of 20" dynode and MCP PMTs
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
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.
citation-role summary
background 1
citation-polarity summary
fields
hep-ex 1years
2026 1verdicts
CONDITIONAL 1roles
background 1polarities
unclear 1representative citing papers
citing papers explorer
-
Long-Delayed Afterpulse Measurement of JUNO 20-inch Photomultiplier Tubes
Long-delayed afterpulses peaking near 260 μs (dynode) and 90/550 μs (MCP), at yields of 10^-3 per primary photoelectron, were measured in JUNO 20-inch PMTs out to 20 ms.