Development of a Two-dimensional Position-Sensitive Photon Counter with -nsec Timing Resolution and -10μ m Position Resolution

我们研究了MBWC位置编码技术的性质。从理论和实验上分析了影响位置分辨力的因素。MBWC方法与其它方法相比具有位置分辨率高、定时快、图像失真小、结构简单等优点。MBWC方法的优化过程也已澄清与电容网络模型。光子计数器电子倍增级的优化设计。e.还详细研究了配备有MBWC阳极MCP基电子检测器，且已经表明几个预防措施是非常重要的。在此基础上，完成了光子计数器的制作和测试装置的研制。首先，对光子计数器特性的进一步研究。e.应实现灵敏度、位置分辨率、图像线性度和定时特性的均匀性。将波长范围扩展到可见光可以导致许多富有成效的应用。最后，更方便的方法来处理电子倍增阶段应调查-例如，一个三MCP组件，半导体阳极背面读出，和“饱和模式”的MCP操作。

We have studied the properties of the MBWC position-encoding technique. The factors affecting the position resolutions have been analyzed theoretically and experimentally. Many advantages of the MBWC method over the other technique have been found; high position resolution, fast timing property, little image distortion, and simplicity in construction. The optimization procedure of the MBWC method has been also clarified with a capacitor-network model. The optimum design of the electron-multiplication stage of the photon counter, i. e. the MCP-based electron detector equipped with a MBWC anode, have been also studied in detail and several precautions have been shown to be essentially important. Based on these results the construction of the apparatus for fabricating and testing a photon counter has been completed.Future problems are as follows. First, the further study on photon-counter properties, i. e. the uniformity of sensitivity, position resolution, linearity of images, and timing properties, should be carried out. Extension of the wavelength range to visible light may lead to many fruitful application. Finally, more convenient ways to handle the electron-multiplication stage should be investigated --- for example, a triple-MCP assembly, a semi-conductor anode with rear-face readout, and the "saturated mode" operation of the MCPs.