Development of sub-nanosecond, high gain structures for time-of-flight ring imaging in large area detectors
Development of sub-nanosecond, high gain structures for time-of-flight ring imaging in large area detectors
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DOI：
10.1016/j.nima.2010.10.084
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发表时间：
2011-05-21
影响因子：
1.4
通讯作者：
Wetstein, Matthew
中科院分区：
文献类型：
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作者：
Wetstein, Matthew
微通道板光电倍增管 (MCP) 是紧凑型成像探测器，能够以低于 10 ps 的分辨率进行微米级空间成像和定时测量。传统的制造方法对于制造典型 HEP 应用所需的数量和尺寸的 MCP 来说过于昂贵，例如飞行时间环形成像切伦科夫探测器 (TOF-RICH) 或基于切伦科夫的水中微子实验。大面积皮秒光电探测器合作组织 (LAPPD) 正在开发新的商业化方法，以与传统光电倍增管相当的成本制造 20 cm(2) 薄平面 MCP。每条线两端均进行波形采样的传输线读出可以有效覆盖大面积，同时保持出色的时间和空间分辨率。我们不是用有源、高二次电子发射材料制造通道板，而是用无源基板生产板，并使用原子层沉积 (ALD)（一种成熟的工业批量工艺）对其进行涂层。除了可能降低成本和调节时间之外，这还可以更好地控制以优化活性材料的成分以实现性能。我们介绍了 MCP 制造方法的详细信息、测试和表征设施的初步结果以及可能的 HEP 应用。 (C) 2010 Elsevier B.V. 保留所有权利。
Microchannel plate photomultiplier tubes (MCPs) are compact, imaging detectors, capable of micron-level spatial imaging and timing measurements with resolutions below 10 ps. Conventional fabrication methods are too expensive for making MCPs in the quantities and sizes necessary for typical HEP applications, such as time-of-flight ring-imaging Cherenkov detectors (TOF-RICH) or water Cherenkov-based neutrino experiments. The Large Area Picosecond Photodetector Collaboration (LAPPD) is developing new, commercializable methods to fabricate 20 cm(2) thin planar MCPs at costs comparable to those of traditional photo-multiplier tubes. Transmission-line readout with waveform sampling on both ends of each line allows the efficient coverage of large areas while maintaining excellent time and space resolution. Rather than fabricating channel plates from active, high secondary electron emission materials, we produce plates from passive substrates, and coat them using atomic layer deposition (ALD), a well established industrial batch process. In addition to possible reductions in cost and conditioning time, this allows greater control to optimize the composition of active materials for performance. We present details of the MCP fabrication method, preliminary results from testing and characterization facilities, and possible HEP applications. (C) 2010 Elsevier B.V. All rights reserved.