Position sensitive anodes for MCP read-out using induced charge measurement
Position sensitive anodes for MCP read-out using induced charge measurement
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DOI：
10.1016/s0168-9002(01)01843-5
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发表时间：
2002-01-21
影响因子：
1.4
通讯作者：
Schmidt-Böcking, H
中科院分区：
文献类型：
--
作者：
Jagutzki, O;Lapington, JS;Schmidt-Böcking, H
我们研究了间接检测投射到电阻层上的MCP电荷雪崩的方法(G.Battistoni等人)。核子。实例。还有梅丝..202(1982)459)。如果方块电阻是有利的，则可以通过电容耦合到层后几毫米处的阳极结构来检测电荷云。阳极结构可以是。例如。楔形和条形电极图案(M.Unverzagt.Diploniarbeit，1992年法兰克福大学，私人通信)，因为它用于直接从MCP.中收集电子雪崩。感应电荷的检测在几个方面是有益的。首先，消除了二次电子介导的电荷再分布引起的图像失真。其次。由于量化电荷收集而产生的噪声分量。通常指的是分区噪声。不存在。此外，电介质基板既可以用作真空外壳的元件，也可以用作高压绝缘体，从而使电气连接易于接近，图案可在地电位下运行。与探测器工作电压无关。这项技术可用于简化电子设计要求，其中探测器输入面需要变化的高电压，如等离子体分析仪。它还应用于增强器管的制造(J.Barnstedt，M.Grewing，Nucl.实例。还有梅丝..我们将介绍使用几种类型的电荷分割阳极的这种检测几何结构的性能数据，并讨论与“传统”电荷收集方法相比的优点。(C)2002 Elsevier Science B.V.保留所有权利。
We investigate the method of an indirect detection of a MCP charge avalanche projected onto a resistive layer (G. Battistoni, et al.. Nucl. Instr. and Meth.. 202 (1982) 459). If the sheet resistance is favourable one can detect the charge cloud by the capacitive coupling to an anode structure a few millimetres behind the layer. The anode structure can be. for example. a wedge-and-strip electrode pattern (M. Unverzagt. Diploniarbeit, Universitat Frankfurt 1992, private communication) as it is used for directly collecting the electron avalanche from a MCP.Detection of the induced charge is beneficial in several respects. Firstly, image distortions produced by secondary electron mediated charge redistribution are eliminated. Secondly. the noise component due to quantized charge collection. commonly referred to as partition noise. is not present. In addition, the dielectric substrate can function both as an element of the vacuum enclosure and HV insulator, making the electrical connections easily accessible and the pattern operable at ground potential. independently of detector operating voltages. This technique can be used to simplify the electronic design requirements where varying high voltages are required at the detector input face such as plasma analysers. etc. It also has application in the manufacture of intensifier tubes (J. Barnstedt, M. Grewing, Nucl. Instr. and Meth.. these proceedings) where the inclusion of a readout pattern inside the intensifier body with associated electrical feed-throughs can prove problematic.We will present data on the performance of such detection geometries using several types of charge division anode, and discuss the advantages compared with the "traditional" charge collecting method. (C) 2002 Elsevier Science B.V. All rights reserved.