暗物质探测中的反符合读出研制及BGO量能器改造
发布时间：2018-10-15 19:29
【摘要】： 本论文包括两部分内容：暗物质间接探测中的反符合探测器读出研制和束流实验中BGO晶体量能器的改造。 暗物质的探测和研究已成为热门的课题之一。在各种宇宙密度模型中,弱作用重粒子(WIMPs)是冷暗物质最可能的候选者。通过搭载在卫星的量能器探测暗物质粒子湮灭产生的单能Y峰或e能谱边缘是有效的探测方法,但同时需要排除宇宙中的带电粒子以及高能反冲的干扰。为了达到目的,以及适应太空环境的要求,实验中我们选择了塑料闪烁条作为反符合探测器,新型的硅光倍增管具有能耗低和尺寸小等优点,经过一系列的实验研究确定采用硅光倍增管(MPPC)加直径1毫米的波移剂光纤WLS作为读出方式,同时给出了探测器光输出的大小,探测效率,并对探测器的时间性能作了进一步的分析。 E3束流线是BEPC试验束最主要的束流装置,BESⅢ部分子探测器模型的刻度实验就是在这条束线上完成的。BGO晶体量能器是运行在E3线上的一个子探测装置,具有单双粒子的鉴别能力,由于读出的光电器件的损坏不能满足实验要求,因此我们对其进行改造,通过对一系列的实验选择了XP2020作为替换器件,改造完成后,并在E3线上进行了测试,对其能量分辨、线形以及单双粒子分别能力作了仔细的研究,圆满完成改造工作。
[Abstract]:This thesis includes two parts: the development of anti-coincidence detector in the indirect detection of dark matter and the modification of BGO crystal calorimeter in beam experiment. The detection and research of dark matter has become one of the hot topics. In various cosmic density models, the weakly acting heavy particle (WIMPs) is the most likely candidate for cold dark matter. It is an effective method to detect the single energy Y peak or the edge of e energy spectrum generated by the annihilation of dark matter particles by means of an energy sensor mounted on a satellite, but it is necessary to eliminate the interference of charged particles and high energy recoil in the universe at the same time. In order to achieve the goal and adapt to the requirements of space environment, we chose the plastic scintillator as the anti-coincidence detector in the experiment. The new silicon photomultiplier tube has the advantages of low energy consumption and small size. Through a series of experimental studies, it is determined that the silicon photomultiplier tube (MPPC) and 1 mm diameter wave-shift agent fiber WLS are used as the readout mode, and the output size and detection efficiency of the detector are also given. Furthermore, the time performance of the detector is further analyzed. The E3 beam streamline is the main beam device of the BEPC test beam, and the calibration experiment of the BES 鈪，
本文编号：2273597
[Abstract]:This thesis includes two parts: the development of anti-coincidence detector in the indirect detection of dark matter and the modification of BGO crystal calorimeter in beam experiment. The detection and research of dark matter has become one of the hot topics. In various cosmic density models, the weakly acting heavy particle (WIMPs) is the most likely candidate for cold dark matter. It is an effective method to detect the single energy Y peak or the edge of e energy spectrum generated by the annihilation of dark matter particles by means of an energy sensor mounted on a satellite, but it is necessary to eliminate the interference of charged particles and high energy recoil in the universe at the same time. In order to achieve the goal and adapt to the requirements of space environment, we chose the plastic scintillator as the anti-coincidence detector in the experiment. The new silicon photomultiplier tube has the advantages of low energy consumption and small size. Through a series of experimental studies, it is determined that the silicon photomultiplier tube (MPPC) and 1 mm diameter wave-shift agent fiber WLS are used as the readout mode, and the output size and detection efficiency of the detector are also given. Furthermore, the time performance of the detector is further analyzed. The E3 beam streamline is the main beam device of the BEPC test beam, and the calibration experiment of the BES 鈪，
本文编号：2273597
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