This paper reports on the time resolution of the Auratek-Square MCP-PMT, a multi-anode microchannel plate photomultiplier produced by Photek. When operating as single photon counter at low photon rate and with a single pixel illuminated it shows a transit time spread (jitter) of ∼100 ps FWHM, saturating at high rate, above ∼100 kHz/mm2. The worsening of the timing performance depends on the bias voltage between the photocathode and the MCP input and between the MCP slabs. The charge sharing between neighbouring pixels can become a major crosstalk source if not accounted for, degrading the time resolution to ∼170 ps FWHM when the entire pixel area is illuminated.
Calvi, M., Capelli, S., Carniti, P., Gotti, C., Pessina, G. (2022). Single photon counting performance of the Auratek-Square MCP-PMT. JOURNAL OF INSTRUMENTATION, 17(11) [10.1088/1748-0221/17/11/P11009].
Single photon counting performance of the Auratek-Square MCP-PMT
Calvi, M.;Capelli, S.;Carniti, P.;Gotti, C.;Pessina, G.
2022
Abstract
This paper reports on the time resolution of the Auratek-Square MCP-PMT, a multi-anode microchannel plate photomultiplier produced by Photek. When operating as single photon counter at low photon rate and with a single pixel illuminated it shows a transit time spread (jitter) of ∼100 ps FWHM, saturating at high rate, above ∼100 kHz/mm2. The worsening of the timing performance depends on the bias voltage between the photocathode and the MCP input and between the MCP slabs. The charge sharing between neighbouring pixels can become a major crosstalk source if not accounted for, degrading the time resolution to ∼170 ps FWHM when the entire pixel area is illuminated.
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