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Description
The Microchannel Plate Photomultiplier (MCP-PMT), also known as Fast-timing PMT (FPMT), is a photosensitive device renowned for its high gain, exceptional detection efficiency, single-photon detection capability, magnetic field resistance, and superior time resolution. Widely utilized in high-energy physics and medical detection applications, the FPMT requires rapid time resolution and robust magnetic field resistance.
Of particular concern are after-pulses, undesired pulses occurring in a PMT following the initial pulse, which can compromise applications requiring minimal noise levels. To enhance the time performance of FPMTs, a comprehensive study was undertaken to investigate the after-pulse characteristics and origins across different FPMT models, encompassing both single-anode and 8 × 8 anode configurations.
Furthermore, to assess the viability of FPMT operation in high magnetic fields, a detailed examination was conducted to evaluate the impact of magnetic fields on the performance metrics of single-anode FPMTs and 8 × 8 anode FPMTs, including Rise Time (RT), Fall Time (FT), Transit Time Spread (TTS), gain, and amplitude.
Initial findings suggest that FPMTs exhibit robust single-photon detection capabilities at 2.4T when the magnetic field aligns parallel to the detector axis, with retained sensitivity at 1.2T even when the field is perpendicular. Notably, the 8 × 8 anode FPMTs display heightened susceptibility to magnetic fields compared to their single-anode counterparts. Further analysis of FPMT signals holds promise in elucidating the differential impact of magnetic fields on various FPMT models, thereby advancing their magnetic field resilience capabilities.
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