Application of a two-dimensional position-sensitive photon detector to time- and space-resolved laser-induced-fluorescence technique

首先，我们利用对真空紫外光敏感的Csl光电阴极，研制了基于MBWC技术的二维位置灵敏光子计数器，并对其特性进行了研究。获得的位置分辨率为-120 UNFm（FWHM），实际长波长极限为-250 nm。在直径为-14mm的有效区（不包括宽度为3 mm的边缘区）内，未观察到灵敏度-波长曲线的位置依赖性。第二，我们的目标是开发另一种计数器，使用CsSb光电阴极，这是敏感的可见光区的光子。遗憾的是，我们的光电阴极寿命不够长（大约一个月），并且还没有达到研究光子计数器的整体性能的步骤。然而，引入合适的“吸气剂”到检测器室被认为是解决这个困难，并且沿着这条线的改进沿着在进行中。最后，完成了激光诱导荧光技术光源的制备。在提高可见光光子计数器的稳定性后，将光子源和探测器结合起来，研究新的LIF技术，例如时间分辨二维LIF。

First we developed a two-dimensional position-sensitive photon counter based on MBWC technique using Csl photo-cathode, which is sensitive to vacuum ultraviolet rays, and studied its properties. Obtained position resolution is -120μm (FWHM) , and practical long wavelength limit is -250 nm. Position dependence of sensitivity-wavelength curve was not observed over the -14mm-diameter effective area excluding the fringe area of which width is 3mm. Second, we aimed at developing another counter using CsSb photo-cathode which is sensitive to photons of visible region. Unfortunately lifetime of our photo-cathode was not long enough, ( 〜a month) and the step of studying overall properties as a photon counter has not been reached. However, introduction of suitable "getter" into a detector chamber is considered to resolve this difficulty, and the improvement along this line is in progress. Finally, The preparation of light source for laser-induced-fluorescence technique has been completed. After improvement of the stability of the visible photon counter, combining the photon source and the detector, new LIF techniques, e.g. time-resolved two-dimensional LIF, will be studied.