Tenfold Speed Accelerator for Resistive Anode Imaging and Optical Anode Alterative

对于低强度电子、离子或光子光束的成像或位置敏感检测（粒子计数），常用的方法是使用微通道板（MCP）增强器（必要时使用适当的发射涂层或光电阴极），然后使用位置敏感阳极。在几种可能的阳极设计中，有一种已经被证明是坚固的，便宜的，非常有用的，特别是当单个粒子到达的时间很重要时，这就是电阻阳极编码器（RAE）。该器件目前的局限性包括由于RC延迟和电子处理时间而限制的最大计数率，以及需要在信号引线上使用高压真空馈通和容易击穿的防区电容，用于阳极必须偏向高压的原位真空应用。将研制新一代快速rae型探测器。提出的新的脉冲处理电子器件，也适用于现有的RAE设备，应该比当前探测器的信号速率提高十倍。新的探测器将用其光学模拟物取代电阻阳极，使用闪烁光波导将电子爆发转换为光脉冲，可以通过光纤信号引线传输。其优点包括固有的高速、抗噪性和非导电信号引线，使探测器可以在高压下浮动。

For imaging or position-sensitive detection (particle counting) of low-intensity electron, ion, or photon beams, a common approach is to use a microchannel plate (MCP) intensifier (with an appropriate emissive coating or photocathode if necessary) followed by a position-sensitive anode. Of several possible anode designs, one which has proven to be rugged, inexpensive, and very useful, particularly when timing of individual particle arrivals is important, is the resistive anode encoder (RAE). Present limitations of this device include limited maximum counting rate due to RC delays and electronic processing times, and the need to use high voltage vacuum feedthroughs and breakdown-prone standoff capacitors on the signal leads for in-situ vacuum applications where the anode must be biased to high voltages. A fast new generation of RAE-type detectors will be developed. Proposed new pulse processing electronics, applicable to existing RAE devices as well, should increase the signal rate over that of current detectors by a factor of ten. The new detector would replace the resistive anode with its optical analog, using a scintillating lightguide to convert an electron burst into optical pulses, which can be transmitted over optical fiber signal leads. The advantages include inherent high speed, noise immunity, and non-conducting signal leads that allow the detector to float at high voltage.