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研究生:李浩斌
研究生(外文):LEE HAW PIN (Li Hau-Bin)
論文名稱:國聖核電廠微中子磁矩實驗
論文名稱(外文):Searching for the neutrino magnetic moment at Kuo-Sheng nuclear power plant
指導教授:黃偉彥王子敬
指導教授(外文):W-Y. Pauchy HwangH. T. Wong
學位類別:博士
校院名稱:國立臺灣大學
系所名稱:物理學研究所
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:英文
論文頁數:84
中文關鍵詞:微中子高能實驗微中子磁矩核電廠
外文關鍵詞:neutrinohigh energy experimentneutrino magnetic momentnuclear power plant
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本實驗的主要目的係研究低能微中子之磁矩。實驗地點在國聖核電廠。本實驗的主要偵測器為一高純鍺(HPGe)偵測器及一碘化銫(CsI)偵測器。再加上適當的屏蔽,反宇宙線偵測器,電子學及數據攫取系統構成了這個實驗。HPGe 偵測器的測量門檻可達5 keV,而背景水準可達到一些地底下的黑暗物質實驗。在本篇論文裡, 主要探討的是HPGe 偵測器的結果。從HPGe 偵測器的數據,我們得到了微中子磁矩小於10^(-10)倍電子的磁矩 (90%信心水準)。
我在本實驗中主要是架設觸發系統及數據攫取系統,並對他們做除錯。 另外,我也參與實驗的取數以及數據的分析。在取數及分析部份,我主要是負則寫在線監控系統程式及制定在線監控的程序,以及寫及制定離線數據的處理及流程,其中包括了大部份物理事例選擇的程式。本篇論文分成五部份:我本人在實驗中的工作,微中子磁矩的介紹,實驗的架設,物理分析以及總結。

We have attempted to set up an experiment to study low energy neutrino physics at Kuo-Sheng Nuclear Power Plant. To carry out the experiment, a HPGe detector and a CsI crystal array detector as well as flexibly-designed shielding, a cosmic veto system, the electronic and data acquisition system(DAQ) have been constructed. An energy threshold of 5 keV for the recoil electron has been achieved for the HPGe detector and the background level is comparable to those Dark Matter experiments underground. We focus on the results of using the HPGe detector in this thesis. From the data of the HPGe detector,
we find a limit on the magnetic moment of neutrino:
<10^(-10)Bohr-Magneton at 90\% CL.
My major role in this experiment is to setup and to debug the trigger and DAQ systems, to participate operations for data taking, and, finally and most importantly, to carry out data analysis. In particular, I have been responsible for the
designing of the online monitoring programming code and procedure, as well as the offline data processing code, and
most of the event selection codes.
This thesis is organized as follows: a brief review
on the neutrino magnetic moment, the design and setup of first stage of the experiment at Kuo-Sheng Nuclear Power Plant in the neutrino magnetic moment search and the detail of data analysis.

chapter 1, Introduction
1.1 Research efforts in my graduate study
1.1.1 Published papers
1.2 Outline of the thesis
1.3 A brief introduction to the experiment
chapter 2, A brief introduction to neutrino megnatic moment
2.1 neutrino-electron scattering
2.2 neutrino-electron scattering experiments
chapter 3, Experimental setup
3.1 Introduction
3.2 The experimental site
3.3 Detectors
3.3.1 The HPGe detector
3.3.2 The CsI array detector
3.4 The background and shielding
3.4.1 The cosmic veto
3.4.2 Lead, boron loaded polyethylele and copper
3.4.3 The anti-Compton detector
3.4.4 The shield of HPGe detector and nitrogen gas
3.5 The DAQ and electronics
3.5.1 The amplifier and shaper
3.5.2 The FADC
3.5.3 Login control and the trigger system
3.5.4 The DAQ and monitoring
3.5.5 Data processing
chapter 4, Data analysis
4.1 Introduction
4.2 The neutrino spectrum
4.3 The recoil electron spectrum
4.4 The event selection
4.4.1 The cosmic veto
4.4.2 The anti-Compton
4.4.3 Summary on the cosmic veto and anti-Compton
4.4.4 The energy calibration
4.4.5 The PSD
4.4.6 Summary of event selection
4.5 The stability check
4.6 Results
4.7 The systematic error
4.8 Summary of the results
chapter 5, Summary

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