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18Математическое моделирование в задачах геофизики и электрофизики 115
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Micrichannel amplifier behavior in strong magnetic field
V. Ya. Ivanov
Institute of Computational Technologies SB RAS
Email: vivanov. [email protected]
DOI: 10.24411/9999-017A-2019-10237
Microchannel plate photomultiplier tubes (MCP PMT) can work in a high magnetic field and have an excellent time resolution. The influence of the magnetic fields up to 4.5 T on the parameters of several MCP PMTs of different designs was investigated. PMTs with two, three and four MCPs were simulated and tested in magnetic fields. Description of mathematical models for fast photo detectors based on microchannel plates (MCP) in three-dimensional formulation is given [1-6]. The models include calculations of photoelectron collection efficiency in the gap photo cathode - MCP, gain factor of secondary electron cascades in the channels, the particle scattering in the gaps between the plates, taking into account the fringe fields and strong external magnetic fields. Comparisons of numerical and experimental data are given [7-11]. The dependencies of major device parameters vs. of applied voltage, pore size, and magnetic field magnitude have been studied. Dependencies of the time resolution, the gain and the photoelectron collection efficiency on the magnetic field are presented.
This work was (partially) supported by the Russian Science Foundation (Project no.16-12-10221). References
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11. M. Barnyakov, A. Barnyakov, V Blinov, V. Bobrovnikov, A. Bykov; V. Ivanov, A. Katcin, E. Mamoshkina, I. Ovtin, K. Petrukhin, S. Pivovarov, V. Prisekin, E. Pyata. Development of a picosecond MCP based particle detector, NIM A (2018) 01 057.
