随着我国社会主义建设、国防建设及科学技术的迅速发展,新型加速器、离子注入机和质谱仪等的研制对直流磁场的测量提出了越来越高的要求。为了精确测量直流磁场的分布,我们研制了核磁共振差值测量系统。将磁场分布的测量精度提高到优于5×10~(-6),达到国外同类装置的水平。 With the rapid development of China’s socialist construction, national defense construction and science and technology, the research and development of new accelerators, ion implanters and mass spectrometers put forward higher and higher requirements for the measurement of DC magnetic field. In order to accurately measure the DC magnetic field distribution, we developed a NMR differential measurement system. The measurement accuracy of the magnetic field distribution is improved to better than 5 × 10 -6, reaching the level of similar devices in foreign countries.