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講者姓名 南智祐
服務機構 臺灣大學梁次震宇宙學與粒子天文物理學研究中心助理研究員
演講時間 2014-05-30
演講題目 在酷寒之地的酷物理–在南極找尋極高能宇宙微中子
摘要 Neutrinos are one of the most interesting particles in cosmic rays because they are bringing the most accurate information about their origin without interaction and deflection before they arrive in Earth. However, neutrinos, especially with ultra high energy E > 10<sup>18</sup> eV are the most difficult particle to detect due to their rarity and low detection efficiency. Searching for those neutrinos, Astro-particle physicist have built the world largest neutrino telescope, IceCube using South Pole Ice, and recently reported the first neutrinos from outside of our Galaxy. Our group in National Taiwan University has been working for new neutrino telescopes in Antarctica searching for radio pulses produced by neutrinos when they collide with matter inside Ice. This approach will enlarge detection capability of neutrino over existing telescopes and will unveil the mystery of cosmogenic neutrinos. In this lecture, I will introduce scientists' journey to astrophysics in Antarctica. Scientific motivation, experimental concepts and techniques will be discussed. Taiwanese activity and future prospect also I will be discussed.<br /> <br /> 宇宙微中子是宇宙射線中最有趣的一員，因為它在抵達地球的一路上不與其他物質反應，也不受偏折，攜帶著關於它們源頭最準確的資訊。但是由於數量稀少且偵測效率低，很難以掌握，尤其是能量超過10<sup>18</sup> 電子伏特的極高能宇宙微中子。為了搜尋它們，科學家利用南極的冰層，建造了世界最大的微中子望遠鏡「冰立方」（Icecube），並在最近偵測到來自銀河系外的訊號。臺大的團隊正在南極打造新一代的微中子望遠鏡，來搜尋微中子與冰層中的物質碰撞後產生的電波脈衝。演講中，南教授介紹了前往南極搜索宇宙微中子的旅程，並探討科學動機和實驗技術，以及未來的展望。<br /> <br /> <b>註：本演講所用語言為英文。</b><br /> <br /> <span style="color: #ff8c00"><b>小技巧報你知：若以FireFox觀賞本演講影片（mp4版），請暫時關掉附加元件中的Shockwave Flash（請至「工具」，打開「附加元件」，找到「Shockwave Flash」後改成「永不啟用」），可縮短等待播出時間。</b></span>
連結網址 http://scitechvista.most.gov.tw/zh-tw/Lectures/C/0/50/3/432.htm