SUPPRESSION OF RADIATION DAMPING IN NMR IN LIQUIDS BY ACTIVE ELECTRONIC FEEDBACK
SUPPRESSION OF RADIATION DAMPING IN NMR IN LIQUIDS BY ACTIVE ELECTRONIC FEEDBACK
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DOI：
10.1006/jmra.1995.1056
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发表时间：
1995-03-01
期刊：
影响因子：
--
通讯作者：
JEENER, J
中科院分区：
文献类型：
--
作者：
BROEKAERT, P;JEENER, J
高分辨率核磁共振中的辐射阻尼可以通过调谐样品电路上的射频反馈来强烈抑制，而不会明显降低检测小信号的信噪比。讨论了高增益射频反馈回路的稳定性问题，并详细介绍了必要的极窄带滤波器的实际实现。实验结果验证了新方案的预期性能。(C) 1995学术出版社，Inc。
Radiation damping in high-resolution NMR can be strongly suppressed by RF feedback on the tuned sample circuit, without appreciable degradation of the signal-to-noise ratio for the detection of small signals. The issue of stability of the high-gain RF feedback loop is discussed, and details are given about a practical realization of the necessary very-narrow-band filter. Experimental results confirm the expected performance of the new scheme. (C) 1995 Academic Press, Inc.