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核磁共振(NMR)在诸多科学领域具有独特的优点,而微波推动的动态核极化(DNP)技术是NMR波谱学中一种重要的手段,可大大增强NMR方法的灵敏度,缩短信息获取时间。DNP-NMR在太赫兹科学和技术方面具有广阔的应用前景。随着DNP-NMR实验朝着高磁场发展,回旋管成为唯一可以产生DNP-NMR实验所必须的高功率太赫兹频率电磁波的器件,且有着较长的使用寿命。本文简要介绍了DNP-NMR的工作原理,并且评述了DNP-NMR系统的太赫兹回旋管的研究概况,同时指出了太赫兹DNP-NMR及所需射频源的发展趋势和一些问题的技术解决途径。
Nuclear Magnetic Resonance (NMR) has unique advantages in many fields of science. Microwave-assisted Dynamic Nuclear Polarization (DNP) is an important technique in NMR spectroscopy, which greatly enhances the sensitivity of NMR method and shortens the information acquisition time. DNP-NMR has broad application prospects in terahertz science and technology. As DNP-NMR experiments toward high magnetic fields, the gyrotron becomes the only device capable of generating high-power terahertz frequencies necessary for DNP-NMR experiments and has a long lifetime. In this paper, the working principle of DNP-NMR is briefly introduced, and the research situation of DNT-NMR system terahertz gyrotron is reviewed. Meanwhile, the development trend of terahertz DNP-NMR and required RF sources and some technical solutions are pointed out .