SOME APPLICATIONS AND PROPERTIES OF ONE-DIMENSIONAL AND TWO-DIMENSIONAL POSITION-SENSITIVE PROPORTIONAL COUNTERS
SOME APPLICATIONS AND PROPERTIES OF ONE-DIMENSIONAL AND TWO-DIMENSIONAL POSITION-SENSITIVE PROPORTIONAL COUNTERS
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DOI：
10.1109/tns.1970.4325710
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发表时间：
1970-01-01
影响因子：
1.8
通讯作者：
KOPP, MK
中科院分区：
文献类型：
--
作者：
BORKOWSKI, CJ;KOPP, MK
提出了一种通过测量高阻收集极探测器输出脉冲上升时间来确定电离事件位置的新方法。基本上，这些探测器是分布的RC线;关于电离事件的位置的信息是从对探测器输出脉冲的频谱的分析中获得的，并且该事件在探测器中的能量损失是通过分析相同输出脉冲的幅度来测量的。三个典型的原型探测器的构造和测试中的一系列成像和衍射实验使用电离辐射。准直210 Po α粒子的空间不确定性为0.15毫米半高宽为200毫米长的比例探测器。准直20 kev x射线的空间不确定性为0.5毫米半高宽为400毫米长的探测器。一个二维系统，使用平行的电线开发和评估。仅用四个前置放大器和相对简单的成形和定时电路，用灵敏面积为75 × 120 mm 2的30线计数器就获得了24，000个分辨率元素（在fwhm处测量）。这些位置敏感探测器非常适合在生命科学中应用，如医学研究中放射性示踪剂的定位、用X射线或中子衍射测定大有机分子的结构、用X射线或中子进行荧光光谱学、用X射线或中子进行小角度散射实验。质子和其他带电粒子的磁光谱学;二维色谱法; x射线天文学;裂变物理实验。
A new method was developed for determining the position of ionizing events by measuring the risetime of output pulses from detectors having high resistance collectors. Basically, these detectors are distributed RC lines; information about the location of an ionizing event is obtained from the analysis of the frequency spectrum of the detector output pulse, and the energy loss of this event in the detector is measured by analyzing the amplitude of the same output pulse. Three typical prototype detectors were constructed and tested in a series of imaging and diffraction experiments using ionizing radiation. The spatial uncertainty for collimated 210Po alpha particles was 0.15 mm fwhm for a 200-mm-long proportional detector. The spatial uncertainty for collimated 20-kev x rays was 0.5 mm fwhm for a 400-mm-long detector. A two-dimensional system using parallel wires was developed and evaluated. With only four preamplifiers and relatively simple shaping and timing circuitry, 24,000 resolution elements (measured at fwhm) were obtained with a 30-wire counter having a sensitive area of 75 × 120 mm2. These position-sensitive detectors are well suited for application in the life sciences for the localization of radioactive tracers in medical studies or in the structure determination of large organic molecules, with x-ray or neutron diffraction; in fluorescent x-ray or neutron spectroscopy; small-angle scattering experiments with x rays or neutrons.; magnetic spectroscopy of protons and other charged particles; two-dimensional chromatography; x-ray astronomy; and fission physics experiments.