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应用于动态核极化核磁共振系统的改进型传输线研究

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

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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%.

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.

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DOI:10.11972/j.issn.1001-9014.2019.06.004

所属栏目:Millimeter Wave and Terahertz Technology

基金项目:the National Key Research and Development Program of China; the Fundamental Research Funds for the Central Universities;

收稿日期:2018-05-17

修改稿日期:--

网络出版日期:2019-12-27

作者单位    点击查看

Yi-Chao CAO:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Qiang CHEN:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Chen ZHANG:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Tao SONG:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Jie HUANG:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Qiao HU:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Di-Wei LIU:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Wei WANG
Min HU:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Ren-Bin ZHONG:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China
Hao SHEN:School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 60054, China

联系人作者:Wei WANG(dawei@uestc.edu.cn)

备注:the National Key Research and Development Program of China; the Fundamental Research Funds for the Central Universities;

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引用该论文

Yi-Chao CAO,Qiang CHEN,Chen ZHANG,Tao SONG,Jie HUANG,Qiao HU,Di-Wei LIU,Wei WANG,Min HU,Ren-Bin ZHONG,Hao SHEN. Investigations on an improved transmission line for THz DNP-NMR spectroscopy[J]. Journal of Infrared and Millimeter Waves, 2019, 38(6): 690-694

Yi-Chao CAO,Qiang CHEN,Chen ZHANG,Tao SONG,Jie HUANG,Qiao HU,Di-Wei LIU,Wei WANG,Min HU,Ren-Bin ZHONG,Hao SHEN. 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

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