脉冲型纵向磁场下多通道非稳态核磁共振研究

项目名称： 脉冲型纵向磁场下多通道非稳态核磁共振研究

项目编号： No.11475067

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 马洪

作者单位： 华中科技大学

项目金额： 80万元

中文摘要： 作为极端实验条件之一的强磁场环境在科学研究中发挥着越来越重要的作用。目前，超过45T的磁场只能通过脉冲方式产生。开展脉冲型纵向磁场下多通道宽带核磁共振现象的研究实验，既是科学研究的需要，也可为脉冲磁体的优化设计提供精确可信的测量依据。本项目以微型核磁共振探头的设计制作为基础，进行脉冲型纵向磁场环境下的非稳态核磁共振现象测量方法与实验装置的研究，以图获取脉冲磁场的全貌。研究内容主要包括四方面：①深入系统地研究脉冲型纵向磁场下非稳态核磁共振的物理机理，制定多收发通道的宽带核磁共振法测量脉冲磁场的技术体制；②设计并制作可用于场强空间分布均匀性较差的脉冲磁体环境中的微型探头；③研究非稳态多通道核磁共振系统中特有的信号处理技术；④设计并搭建双发双收非稳态核磁共振实验装置，实验观察非稳态核磁共振现象并验证关键电子学技术。对上述问题的深入研究，可为脉冲强磁场下核磁共振技术的发展与脉冲磁体的优化奠定基础。

中文关键词： 核磁共振；脉冲型纵向磁场；非稳态；多通道；微型探头

英文摘要： As one of extreme experimental conditions,high magnetic field environment is playing an increasingly important role in scientific research. Presently, those magnetic fields above 45T can only be produced in the condition of pulse current excitation. It is very important to carry out multi-channel non-steady state NMR experiment in pulsed longitudinal magnetic field environment, which is not only the need of scientific research, but also can provide accurate and reliable basis for optimizing the pulsed magnet. Based on the design of micro NMR probe, the project research on non steady state nuclear magnetic resonance measurement method in pulsed longitudinal magnetic field environment and experimental device. The main research contents contain four aspects: ① Thoroughly and systematically study the physical mechanism of non-steady nuclear magnetic resonance(NMR),and develop the multi channel technology system of broadband nuclear magnetic resonance method for measuring the pulsed magnetic field; ② Design and fabrication some miniaturized NMR probes which will be adapted to use in the pulsed magnet environment with poor spatial uniformity; ③ Research unique signal processing technologies for multiple channels non-steady state NMR system; ④ Design and build the double transceiver non steady state NMR experimental device,experimentally observe non-steady-state nuclear magnetic resonance phenomenon and validate key electronics technology. In-depth study on these issues, provide a basis for development of NMR technology in pulsed high magnetic field and optimization of pulsed magnets.

英文关键词： NMR;pulsed longitudinal magnetic field;non-steady state;muti-channel;micro probe