用于无屏蔽超低场核磁共振实验样品预磁化的快速切换线圈系统
Fast switching coil system for sample premagnetization in an unshielded ultra-low-field Nuclear Magnetic Resonance experiment
摘要：
我们提出了一个系统开发的预磁化液体样品在超低场核磁共振（NMR）实验。将几毫升的液体样品暴露于约70 mT的磁场中，该磁场被快速关闭，从而留下横向微特斯拉场，其中原子核开始进动。瞬态和中间场水平的准确表征使得基于光学磁力计的检测系统能够可靠地操作。
英文摘要：
We present a system developed to premagnetize liquid samples in an ultra-low-field Nuclear Magnetic Resonance (NMR) experiment. Liquid samples of a few milliliter are exposed to a magnetic field of about 70~mT, which is abruptely switched off, so to leave a transverse microtesla field where nuclei start precessing. An accurate characterization of the transients and intermediate field level enables a reliable operation of the detection system, which is based on an optical magnetometer.
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