应用于动态核极化核磁共振系统的改进型传输线研究
投稿时间:2018-05-15  修订日期:2019-11-14  点此下载全文
引用本文:曹毅超,陈强,张晨,宋韬,黄杰,胡巧,刘頔威,王维,胡旻,钟任斌,沈皓.应用于动态核极化核磁共振系统的改进型传输线研究[J].红外与毫米波学报,2019,38(6):690~694].CAO Yi-Chao,CHEN Qiang,ZHANG Chen,SONG Tao,HUANG Jie,HU Qiao,LIU Di-Wei,WANG Wei,HU Min,ZHONG Ren-Bin,SHEN Hao.Investigations on an improved transmission line for THz DNP-NMR spectroscopy[J].J.Infrared Millim.Waves,2019,38(6):690~694.]
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作者单位邮编
曹毅超 电子科学与工程学院 电子科技大学 610054
陈强  
张晨  
宋韬  
黄杰  
胡巧  
刘頔威 电子科学与工程学院 电子科技大学 
王维  
胡旻  
钟任斌 电子科学与工程学院 电子科技大学 
沈皓  
中文摘要:基于几何光学理论和矢量衍射理论,设计了263 GHz DNP-NMR谱仪的改进反射镜系统,并进行了数值模拟.该系统包括两个波纹波导、一个抛物面镜和一个角度可调的相位校正镜.仿真结果表明,获得了聚焦良好的类高斯输出光束,其标量高斯模含量为99.90%,矢量高斯模含量为99.55%.只有通过调整相位校正镜的角度来匹配DNP-NMR样品,才能改变输出光束的方向.当输出光束方向在±15o变化时,标量高斯模含量约为99.57%,矢量高斯模含量约为98.97%.
中文关键词:传输线  相位矫正镜  核磁共振  动态核极化
 
Investigations on an improved transmission line for THz DNP-NMR spectroscopy
Abstract:The improved transmission and mirror system for a 263 GHz DNP-NMR spectrometer has been designed and numerically simulated based on the geometric optics theory and the vector diffraction theory. The system includes two corrugated waveguides, a parabolic mirror and an angle-adjustable phase-correcting mirror. The simulation results show that a well-focused Gaussian-like output wave-beam with 99.90% scalar Gaussian mode content, 99.55% vector Gaussian mode content has been obtained. The direction of the output beam can be changed by only adjusting the angle of the phase-correcting mirror to match the DNP-NMR sample. The scalar Gaussian mode content is about 99.57%, and the vector Gaussian mode content is about 98.97% when the direction of the output beam changes in ± 15o.
keywords:transmission line  phase-correcting mirror  nuclear magnetic resonance  dynamic nuclear polarization
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