The pulse digitization for measuring the time of flight of ionizing particles
The pulse digitization for measuring the time of flight of ionizing particles
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DOI：
10.1016/s0168-9002(99)00813-x
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发表时间：
2000-01
影响因子：
1.4
通讯作者：
A. Codino
中科院分区：
文献类型：
--
作者：
A. Codino
描述了一种处理连接到用于飞行时间测量的硅带探测器的前置放大器的输出信号的新方法。从硅带望远镜两个臂发出的脉冲对存储在瞬态数字化仪中，最小采样周期为 5ps，并进行软件分析。该方法从读出系统中消除了鉴别器和时间数字转换器。使用新技术，望远镜在不同阈值下的时间分辨率是由软件算法确定的，该算法再现了幅度鉴别器和恒定分数鉴别器的功能。报告了使用来自 90Sr 源的电子对新读出系统的望远镜时间分辨率的测量结果。在室温下，使用这种新技术和未优化的软件算法获得的望远镜时间分辨率为 235±55 ps，而使用经典读出方法得到的时间分辨率为 160±35 ps。讨论了这些测量的技术限制。
A new method of processing the output signals of preamplifiers connected to silicon strip detectors operated for time-of-flight measurements is described. Pulse pairs coming out from the two arms of a silicon strip telescope are stored in a transient digitizer with a minimum sampling period of 5ps and software analyzed. This method eliminates both discriminators and time-to-digital converters from the readout system. Using the new technique, the time resolution of the telescope, at various thresholds, is determined by software algorithms that reproduce the functions of both amplitude and constant-fraction discriminators. Measurements of time resolution of the telescope of the new readout system, using electrons from the source90Sr are reported. At room temperature the time resolution of the telescope, obtained with this new technique and an unoptimized software algorithms is 235±55 ps to be compared with that of 160±35 ps resulting from the use of the classical readout method. Technical limitations of these measurements are discussed.