本文選題：γ射線　切入點：100TeV　出處：《河北師范大學》2014年碩士論文

【摘要】：自1912年Victor Hess發(fā)現(xiàn)宇宙線至今，一百多年來，人們通過對宇宙線的研究，推動了粒子物理和天體物理的發(fā)展。但是，宇宙線的起源和加速問題仍是沒有得到解決的世紀難題。人們普遍認為對100TeV能區(qū)γ射線的觀測是尋找宇宙線源的最有效手段。 中日合作ASγ實驗位于西藏當雄縣羊八井鎮(zhèn)，海拔4300m，擁有789個閃爍體探測器（Tibet-III）和已建成的5組水契倫科夫地下繆子單元探測器（MD-I）。為了進一步提高實驗的靈敏度，我們計劃在現(xiàn)有表面陣列的外圍增設160個閃爍體探測器，，這樣不僅可以花費少，而且把100TeV能區(qū)的有效探測面積增大2倍。實驗靈敏度將在TibetIII+MD-I的基礎上提高2倍，我們稱升級陣列為“擴展陣列”。 本論文重點介紹本人在碩士研究生期間參與的ASγ實驗擴展陣列探測器研制、測試和優(yōu)化工作。首先第一章和第二章分別簡要介紹了宇宙射線的背景知識和西藏羊八井ASγ實驗。在第三章介紹了對四種2英寸候選光電倍增管的主要性能（絕對增益、高壓響應、暗計數(shù)率、讀出信號線性范圍、地磁效應、光陰極的均勻性以及時間特性）的測試方法和測試結(jié)果。第四章介紹了通過改進光電倍增管R7725CA0130的分壓器（優(yōu)化分壓配比，使用“錐形分壓”），采用陽極和第9打拿極共同讀出來實現(xiàn)探測器對大動態(tài)范圍的要求。第五章是對研制的擴展陣列原型探測器的電荷和時間一致性的性能測試。第六章是總結(jié)和展望。
[Abstract]:Since the discovery of cosmic rays by Victor Hess in 1912, the research on cosmic rays has promoted the development of particle physics and astrophysics.However, the origin and acceleration of cosmic rays are still unsolved century problems.It is generally believed that the observation of 緯-ray in the 100TeV energy region is the most effective way to find the cosmic ray source.The Sino-Japanese cooperative as 緯 experiment is located in Yangbajing Town, Dangxiong County, Tibet, at an altitude of 4300m. It has 789 scintillator detectors Tibet-III) and five groups of underground Miao subunit detectors of Shuichilenkov, Tibet.In order to further improve the experimental sensitivity, we plan to add 160 scintillator detectors to the periphery of the existing surface array, which can not only cost less, but also increase the effective detection area of the 100TeV energy region by 2 times.The experimental sensitivity will double that of TibetIII MD-I. We call the upgraded array "extended array."This thesis focuses on the development, test and optimization of as 緯-experiment expanded array detector.In the first and second chapters, the background of cosmic ray and the as 緯 experiment of Yangbajing in Tibet are briefly introduced.In chapter 3, the main performances of four 2-inch candidate photomultiplier tubes (absolute gain, high voltage response, dark counting rate, linear range of readout signal, geomagnetic effect) are introduced.Methods and results of measurement of photocathode uniformity and time characteristics.In the fourth chapter, by improving the voltage divider of the photomultiplier tube (R7725CA0130), the requirements of the detector for a large dynamic range are realized by using the anode and the 9th pole to read out the detector by optimizing the proportion of the voltage divider, using the "conical voltage divider" and using the anode and the 9th pole.The fifth chapter is the performance test of charge and time consistency of the prototype detector with extended array.The sixth chapter is the summary and prospect.
【學位授予單位】：河北師范大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：P171

【參考文獻】

相關期刊論文 前1條

1 馮朝陽;張毅;劉成;樊超;李紅超;王博;吳含榮;胡紅波;盧紅;譚有恒;;Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment[J];中國物理C;2011年02期

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