High-reliability GaAs image intensifier with unfilmed microchannel plate
High-reliability GaAs image intensifier with unfilmed microchannel plate
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DOI：
10.1117/12.354970
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发表时间：
1999-07
期刊：
影响因子：
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通讯作者：
E. Bender;J. Estrera;C. E. Ford;A. Giordana;John W. Glesener-;P. P. Lin-P.;A. Nico;T. Sinor;R. Smithson
中科院分区：
文献类型：
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作者：
E. Bender;J. Estrera;C. E. Ford;A. Giordana;John W. Glesener-;P. P. Lin-P.;A. Nico;T. Sinor;R. Smithson
目前的GaAs像增强器技术要求微通道板（MCP）在面向光电阴极的一侧具有薄的电介质膜。这种保护涂层大大减少了离子和中性物质从微通道中的脱气量。为了防止GaAs光电阴极上Cs：O表面的“中毒”，必须防止MCP脱气。许多作者已经尝试省略MCP涂层。这些实验的结果总是导致增强器的报告使用寿命小于100小时，由于污染的Cs：O层的光阴极。不幸的是，MCP膜也是增强器内电子传输的屏障。图像增强器操作参数的显著增强是去除MCP膜的动机。本文介绍的结果表明，第一次，它是有可能制造一个长寿命的图像增强器与一个单一的未涂覆MCP。
Current GaAs image intensifier technology requires that the microchannel plate (MCP) have a thin dielectric film on the side facing the photocathode. This protective coating substantially reduces the amount of outgassing of ions and neutral species from the microchannels. The prevention of MCP outgassing is necessary in order to prevent the `poisoning' of the Cs:O surface on the GaAs photocathode. Many authors have experimented with omitting the MCP coating. The results of such experiments invariably lead to an intensifier with a reported useful life of less than 100 hours, due to contamination of the Cs:O layer on the photocathode. Unfortunately, the MCP film is also a barrier to electron transport within the intensifier. Substantial enhancement of the image intensifier operating parameters is the motivation for the removal of the MCP film. This paper presents results showing for the first time that it is possible to fabricate a long lifetime image intensifier with a single uncoated MCP.