Milnes J S, Conneely T M, Horsfield C J, Lapington J
Photek Ltd., 26 Castleham Road, St Leonards on Sea, East Sussex TN38 9NS, United Kingdom.
AWE Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom.
Rev Sci Instrum. 2018 Oct;89(10):10K104. doi: 10.1063/1.5036635.
Microchannel plate (MCP) photomultiplier tubes (PMTs) are a well-established instrument for the inertial confinement fusion (ICF) community, with several detectors installed at NIF, Omega (LLE Rochester), and Orion (AWE). The analog signals produced at these major ICF facilities cover many orders of magnitude and often need multiple detectors operating at different levels of electron gain. As such, understanding the upper saturation limit of MCP-PMTs to large, low rate signals takes on a high importance. A previous study looked at the saturation limit of double and single MCP-PMTs over their full working area with pulse widths between 4 ns and 100 ns. This follow-on analysis will look at the effect of how the illuminated area affects the saturation limit and at the impact of the MCP to anode extraction field on the impulse response and the level of saturation.
微通道板（MCP）光电倍增管（PMT）是惯性约束聚变（ICF）领域中一种成熟的仪器，在国家点火装置（NIF）、欧米伽（罗切斯特大学激光能量学实验室）和猎户座（原子武器研究中心）都安装了多个探测器。这些主要ICF设施产生的模拟信号涵盖多个数量级，通常需要多个在不同电子增益水平下工作的探测器。因此，了解MCP-PMT对大的低速率信号的饱和上限非常重要。之前的一项研究考察了双MCP-PMT和单MCP-PMT在其整个工作区域内，脉冲宽度在4纳秒至100纳秒之间时的饱和极限。本后续分析将研究光照面积如何影响饱和极限，以及MCP到阳极的引出场对脉冲响应和饱和水平的影响。
