【摘要】： 本論文包括兩部分內(nèi)容：暗物質(zhì)間接探測中的反符合探測器讀出研制和束流實驗中BGO晶體量能器的改造。 暗物質(zhì)的探測和研究已成為熱門的課題之一。在各種宇宙密度模型中,弱作用重粒子(WIMPs)是冷暗物質(zhì)最可能的候選者。通過搭載在衛(wèi)星的量能器探測暗物質(zhì)粒子湮滅產(chǎn)生的單能Y峰或e能譜邊緣是有效的探測方法,但同時需要排除宇宙中的帶電粒子以及高能反沖的干擾。為了達到目的,以及適應(yīng)太空環(huán)境的要求,實驗中我們選擇了塑料閃爍條作為反符合探測器,新型的硅光倍增管具有能耗低和尺寸小等優(yōu)點,經(jīng)過一系列的實驗研究確定采用硅光倍增管(MPPC)加直徑1毫米的波移劑光纖WLS作為讀出方式,同時給出了探測器光輸出的大小,探測效率,并對探測器的時間性能作了進一步的分析。 E3束流線是BEPC試驗束最主要的束流裝置,BESⅢ部分子探測器模型的刻度實驗就是在這條束線上完成的。BGO晶體量能器是運行在E3線上的一個子探測裝置,具有單雙粒子的鑒別能力,由于讀出的光電器件的損壞不能滿足實驗要求,因此我們對其進行改造,通過對一系列的實驗選擇了XP2020作為替換器件,改造完成后,并在E3線上進行了測試,對其能量分辨、線形以及單雙粒子分別能力作了仔細(xì)的研究,圓滿完成改造工作。
[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，

本文編號：2273597