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°.
作者
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
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)
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
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)
关键词
传输线
相位矫正镜
核磁共振
动态核极化
transmission line
phase-correcting mirror
nuclear magnetic resonance
dynamic nuclear polarization
