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A high performance, microchannel plate based, photon counting detector for space use.

机译：一款基于微通道板的高性能光子计数检测器，适合空间使用。

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摘要

This thesis describes the development of a microchannel plate (MCP) based photon counting detector using the Spiral Anode (SPAN) as a readout. This detector was one of two being evaluated for use in the Optical Monitor for ESA's X-ray Multi Mirror satellite. Throughout this thesis, where possible, the underlying physical processes, particularly those of the MCP, have been identified and studied separately. The first chapter is an introduction to photon counting detectors and includes a review of the various readouts used with MCPs. The second chapter provides a more detailed review and analysis of cyclic, continuous-electrode, charge-division readouts, of which SPAN is an example. The next two chapters describe the technique for measuring the radial distribution of the MCP charge cloud, which can significantly affect detector imaging performance. Results are presented for various operating conditions. The distribution consists of two parts and the size is dependent on the operating voltages of the MCP stack. The fifth and sixth chapters describe the procedure for operating a SPAN readout and the decoding necessary for converting the ADC readings into a two dimensional coordinate. Various methods are described and their limitations evaluated. The cause of problems associated with the SPAN readout, such as "ghosting" and fixed patterning and methods of reducing them are discussed in detail. Results are presented which demonstrate the performance of the anode. The seventh chapter discusses and evaluates the interaction between channels in MCPs and the long range effects an active pore has on the surrounding quiescent pores. This represents the first time that these effects have been measured. The importance of this phenomenon for imaging detectors is discussed and possible mechanisms evaluated. The last chapter presents the conclusions of this work and discusses the suitability of SPAN detectors for use on satellites.
机译：本文描述了一种基于微通道板（MCP）的光子计数探测器的开发，该探测器使用螺旋阳极（SPAN）作为读数。该探测器是被评估用于ESA X射线多镜卫星光学监控器的两种探测器之一。在整个论文中，可能的情况下，已经分别确定并研究了基础物理过程，尤其是MCP的物理过程。第一章介绍了光子计数检测器，并介绍了与MCP一起使用的各种读数。第二章提供了对循环，连续电极，电荷分配读数的更详细的回顾和分析，其中以SPAN为例。接下来的两章介绍了用于测量MCP电荷云的径向分布的技术，该技术会严重影响检测器的成像性能。给出了各种操作条件下的结果。该分布包括两个部分，其大小取决于MCP堆栈的工作电压。第五章和第六章介绍了操作SPAN读数的过程以及将ADC读数转换为二维坐标所需的解码的过程。描述了各种方法并评估了其局限性。详细讨论了与SPAN读数相关的问题的原因，例如“重影”和固定模式以及减少它们的方法。给出的结果证明了阳极的性能。第七章讨论并评估了MCP中通道之间的相互作用以及活性孔对周围静态孔的远距离影响。这是第一次测量到这些影响。讨论了这种现象对成像探测器的重要性，并评估了可能的机制。最后一章介绍了这项工作的结论，并讨论了SPAN探测器在卫星上的适用性。

著录项

  • 作者

    Edgar, Michael Leonard.;

  • 作者单位

    University of London, University College London (United Kingdom).;

  • 授予单位 University of London, University College London (United Kingdom).;
  • 学科 Aerospace engineering.;Optics.
  • 学位 Ph.D.
  • 年度 1993
  • 页码 324 p.
  • 总页数 324
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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