RIBLL上二维位置灵敏探测器的研制

发布时间：2018-03-18 21:37

本文选题：兰州重离子放射性束流线　切入点：双层多丝正比室　出处：《西南大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着国内外放射性束物理的深入发展,其研究对象转移向低Z值附近的丰质子和丰中子核,例如He6、8He、9Li、11Be、12Be、14Be、9C、10C等。在兰州重离子放射性束流线(Radioactive Ion Beam Line in Lanzhou)上这些核的产额低,这就使得对探测器的探测效率提出更高要求。研制一种高性能的气体探测器——基于LC延迟电路的双层多丝正比室(Double-layer Multi-Wire Proportional Chamber based on LC delay circuit),提高对中高能重离子的探测效率,测量靶前入射粒子径迹和靶后粒子的飞行方向。同时为提高束流的传输效率,分离和鉴别束流成分起重要作用。本文主要描述了为兰州重离子放射性束流线(RIBLL II)上测量中高能放射性离子的位置而研制的一种基于LC延迟电路的双层多丝正比室(MWPC)。该探测器的探测灵敏面积是80100?mmmm,其位置信号通过阴极丝引出并经过LC延迟电路读出。探测器是由两套完整的多丝正比室组成,每套的阳极丝等间距的夹在两层平行的阴极丝之间,阴极丝与阳极丝相互垂直。两套阴极丝对应相互垂直并且输出入射粒子的二维位置信息。将每套位置对应的阴极丝合并成一路接入LC延迟电路来增大感应信号以提高探测器的探测效率。用5.9keVFe-55的X射线源均匀地照射探测器的灵敏区域,测试结果显示其具有良好的位置灵敏一致性。用5.9keVFe-55的X射线源通过准直狭缝扫描整个探测器的灵敏区域,得到X,Y层的位置线性度均好于0.999,探测器的位置分辨(?)分别是199.9?m和154.0?m。研制出的探测器已在RIBLL II进行的实验中投入使用,其工作性能稳定。
[Abstract]:With the further development of radiation beam physics at home and abroad, the research object is transferred to proton rich and neutron rich nuclei near low Z value, for example, He6D8 Hean8He9Li 11Ben 11Ben 12Ben 14BeN 9C 10C, etc. The yields of these nuclei are low on the Radioactive Ion Beam Line in Lanzhou. of the heavy ion radioactive beam streamline in Lanzhou, In order to improve the detection efficiency of the detector, a high performance gas detector, a double-layer Multi-Wire Proportional Chamber based on LC delay circuit, is developed, which is based on LC delay circuit to improve the detection efficiency of medium-high energy heavy ions. The track of incident particle in front of target and the flying direction of particle behind target are measured. In order to improve the transmission efficiency of beam, The separation and identification of beam composition play an important role. This paper describes a double layer multiwire proportional circuit based on LC delay circuit for the location of high energy radioactive ions measured on Lanzhou heavy ion beam streamlines (RIBLL II). The sensitive area of the detector is 80100? Mm, the position signal is elicited by the cathode wire and read out by the LC delay circuit. The detector is composed of two complete multiwire proportional chambers, each set of anode wires with equal spacing between two parallel cathode wires. Cathode wire and anode wire are perpendicular to each other. Two sets of cathode wires are perpendicular to each other and output two-dimensional position information of incident particles. The cathode wire corresponding to each set of positions is combined into a single line of LC delay circuit to increase the induction signal. Improving the detection efficiency of the detector. The sensitive region of the detector is uniformly illuminated with an X-ray source of 5.9 Kev Fe-55, The results show that the X-ray source of 5.9keV Fe-55 can scan the sensitive region of the detector by collimation slit, and the linearity of the XY layer is better than that of 0.999.The position resolution of the detector is better than that of the X-ray source of 5.9keVFe-55. ) they are 199.9. M and 154.0? The developed detector has been used in the experiment of RIBLL II, and its performance is stable.
【学位授予单位】：西南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O571

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