应用于动态核极化核磁共振系统的改进型传输线研究
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电子科学与工程学院 电子科技大学

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TN814

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Investigations on an improved transmission line for THz DNP-NMR spectroscopy
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School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

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the National Key Research and Development Program of China 2017YFA0701000;the Fundamental Research Funds for the Central Universities A03018023601003Supported by the National Key Research and Development Program of China (2017YFA0701000), the Fundamental Research Funds for the Central Universities ( A03018023601003).

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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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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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历史
  • 收稿日期:2018-05-15
  • 最后修改日期:2019-11-14
  • 录用日期:2019-07-05
  • 在线发布日期: 2019-12-17
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