应用于太赫兹波驱动的DNP-NMR传输线  

Transmission Line for DNP-NMR Driven by Terahertz Wave

作　　者：王维[1,2] 张澳歌 宋韬[1,2] 姚纳 焦蛟 张开春[1,2] 刘頔威[1,2] WANG Wei;ZHANG Ao-ge;SONG Tao;YAO Na;JIAO Jiao;ZHANG Kai-chun;LIU Di-wei(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;Key Laboratory of THz Technology,Ministry of Education,University of Electronic Science and Technology of China,Chengdu 610054,China;School of Aeronautics and astronautics,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都611731 [2]电子科技大学太赫兹技术教育部重点实验室,四川成都611731 [3]电子科技大学航空航天学院,四川成都611731

出　　处：《真空电子技术》2024年第3期5-9,共5页Vacuum Electronics

基　　金：国家自然科学基金(62371092,61988102,61921002,62101106);四川省自然科学基金(2024NSFSC0465);中央高校基本科研业务费专项资金资助(ZYGX2020ZB008和ZYGX2021J011);四川省博士后科学专项基金(TB2022039)。

摘　　要：太赫兹波驱动的动态核极化增强核磁共振波谱系统可大幅提高信号灵敏度和缩短检测时间。该系统需采用传输线在驱动源回旋管与谱仪之间进行太赫兹波传输。本文针对400 MHz增强核磁共振系统设计了由准光模式变换器和波纹波导组成的太赫兹传输线,并进行了相关实验测试,测试结果表明准光模式变换器可将263 GHz回旋管TE 03模式转换成准高斯波束,其高斯成份为97%,整个传输线最终输出波束的高斯成份为96.3%。The dynamic nuclear polarization enhanced nuclear magnetic resonance(DNP-NMR)spectroscopy system driven by terahertz wave can greatly improve the signal sensitivity and shorten the detection time.In the system,a transmission line is required to transmit terahertz wave between the driving source gyrotron and the spectrometer.A terahertz transmission line consisting of quasi-optical mode converter(QOMC)and corrugated waveguide for a 400MHz DNP-NMR system is designed and tested.The result shows that the QOMC can convert the 263GHz gyrotron TE03 mode into a quasi-Gaussian beam with a Gaussian component of 97%,and the final output beam of the entire transmission line has a Gaussian component of 96.3%.

关 键 词：太赫兹 增强核磁共振 回旋管 传输线 准光模式变换 

分 类 号：TN12[电子电信—物理电子学]