【摘 要】
：
本团队于2013 年开发了第一代微型inside-out 核磁共振传感器，其磁体结构及灵敏区域示意图和实物图如图1和图2所示.该传感器静态磁场B0 方向平行于传感器轴向，射频线圈采用马鞍型结构.通过测量不同孔隙介质(图3)的T2eff(图4)和porosity(图5)，证明该传感器能够较好的区分不同的孔隙介质.由于第一代传感器线圈离磁体表面太近，射频磁场B1 在屏蔽层产生的涡流场严重影响传感器的灵
【机 构】
：
重庆师范大学物理与电子工程学院,重庆,400047 重庆大学输配电装备及系统安全与新技术国家重点实
【出 处】
：
第七届全国低场核磁共振技术与应用研讨会
论文部分内容阅读
本团队于2013 年开发了第一代微型inside-out 核磁共振传感器，其磁体结构及灵敏区域示意图和实物图如图1和图2所示.该传感器静态磁场B0 方向平行于传感器轴向，射频线圈采用马鞍型结构.通过测量不同孔隙介质(图3)的T2eff(图4)和porosity(图5)，证明该传感器能够较好的区分不同的孔隙介质.由于第一代传感器线圈离磁体表面太近，射频磁场B1 在屏蔽层产生的涡流场严重影响传感器的灵敏度，此外，传感器没有保护外壳，无法直接应用于工程实际.针对上述问题，设计了第二代微型inside-out 核磁共振传感器.该传感器保护壳为无磁钛合金，射频线圈距保护壳5mm.
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