研究生: |
袁健傑 |
---|---|
論文名稱: |
超導量子干涉儀應用於光激發3He稀有氣體之磁共振研究 |
指導教授: |
楊鴻昌
Yang, Hong-Chang 洪姮娥 Horng, Herng-Er |
學位類別: |
碩士 Master |
系所名稱: |
光電工程研究所 Graduate Institute of Electro-Optical Engineering |
論文出版年: | 2006 |
畢業學年度: | 94 |
語文別: | 中文 |
中文關鍵詞: | 極化氣體 、核磁共振 |
論文種類: | 學術論文 |
相關次數: | 點閱:202 下載:0 |
分享至: |
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摘要
我們架設一套可以同時極化3He並且量測低磁場核磁共振的系統,其共振磁場約在10-4 T數量級,並比較直接利用超導量子干涉儀( SQUID )靠近極化腔作探測,量測極化氣體的核磁共振訊號,及利用線圈耦合訊號於超導量子干涉儀作為偵測,比較其訊雜比,而結果在113 μT的低磁場下,因為受限於加熱管路的限制,超導量子干涉儀無法很靠近極化腔,而利用線圈耦合3He氣體NMR訊號於超導量子干涉儀的方式下,得到的訊號雜訊比較佳,比起單純利用超導量子干涉儀感應訊雜比提升了百倍,而在改變耦合線圈的匝數又可使核磁共振訊號持續的增加,在調整線圈的參數後,最終的訊雜比約2200,
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