应用于动态核极化核磁共振系统的改进型传输线研究（英文）  

Investigations on an improved transmission line for THz DNP-NMR spectroscopy

作　　者：曹毅超 陈强[1] 张晨[1] 宋韬[1] 黄杰[1] 胡巧 刘頔威[1] 王维[1] 胡旻[1] 钟任斌[1] 沈皓 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(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科学与工程学院电子科技大学

出　　处：《红外与毫米波学报》2019年第6期690-694,共5页Journal of Infrared and Millimeter Waves

基　　金：Supported by the National Key Research and Development Program of China(2017YFA0701000);the Fundamental Research Funds for the Central Universities(A03018023601003)

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±15°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%.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±15°.

关 键 词：传输线 相位矫正镜 核磁共振 动态核极化 

分 类 号：TN814[电子电信—信息与通信工程]