使用微中子望遠鏡的前端讀出系統做單光子之量測

The Single Photon Measurement by Using The Front-End Readout System of Neutrino Telescope

張智堡(Chih-Pao Chang)

指導教授 ： 王名儒

國立臺灣大學/理學院/物理研究所/碩士(2011年)

https://doi.org/10.6342/NTU.2011.00239

摘要

台灣大學高能實驗室的微中子望遠鏡 （NuTel） 是一個利用擦射地球法（Earth-skimming technique）來觀測陶子微中子的偵測器，當陶子微中子與地表起作用會產生陶子。而微中子望遠鏡主要是觀測高能量陶子產生的契倫諧夫光（Cherenkov light）來作為偵測到陶子微中子的證據。因此，微中子望遠鏡的光度校正是非常重要的。
這篇論文主要集中於單光子量測。我們利用微中子望遠鏡的電子前端讀出系統來觀測單光電子，藉由三種方法，我們成功地量測到單光電子相對應的數位量值。另外，我們組裝了一個可達一萬伏特的高壓電源供應器來供給hybrid photodetector (HPD)，並且利用HPD，我們成功地觀測到單光電子的峰值，證實微 中子望遠鏡的電子前端讀出系統所量出的結果。
利用以上的光度校正數據，我們可以估算微中子望遠鏡所收集的光子數。而在2009年夏天，我們在梅峰進行了夜間天空背景量測（night sky background）， 估算出其光通量。
至今，電子前端讀出系統已成功觀測到單光電子。因此，微中子望遠鏡有能力估計量測到的光子數量。

關鍵字

使用微中子望遠鏡的前端讀出系統做單光子之量測

並列摘要

NuTel (Neutrino Telescope) is a detector to detect the tau neutrino ντ with the earth skimming technique. Through mountains, ντ converts to τ leptons. NuTel is designed to observe the Cherenkov light from the air shower that produced by high energy τ leptons. For the NuTel experiment, the calibration of the brightness measurement is important.
This thesis focuses on the single photon measurement. We used the electronic read- out systems of NuTel to observe single photoelectron. By three kinds of methods, we got the digitized value corresponds to the single photoelectron. Furthermore, we made a 10kV power supply for the HPD (Hybrid Photo Detector) and confirmed the measurement
of single photoelectron. By using these results, the photon flux of night sky background,
which was observed by NuTel at Mei-Fong in ’09 July, was estimated.
So far, NuTel succeeded in single photon measurement. As a result, NuTel is capable of measuring the number of photons in a triggered event.

並列關鍵字

The Single Photon Measurement by Using The Front-End Readout System of Neutrino Telescope

參考文獻

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