High‐Resolution NMR Spectrometer with the Radio Frequency Controlled by the Magnetic Field

Freeman R.; Pound R. V.

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High‐Resolution NMR Spectrometer with the Radio Frequency Controlled by the Magnetic Field

机译：磁场控制射频的高分辨率NMR光谱仪

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A practical spectrometer for the observation of high‐resolution proton magnetic resonance spectra at 30 Mc is described. Field modulation is imposed in such a way that ``sideband'' responses are observed, and this enables lock‐in detection to be used, giving increased stability to the baseline of the records. Spectra are displayed by slowly sweeping the modulation frequency and thus are calibrated directly in frequency. The radio‐frequency source is a proton controlled super‐regenerative oscillator, whose frequency follows variations of the electromagnet field. This reduces the effects of field drift and instability, allowing relatively slow scanning speeds to be used in recording the spectra.

机译：描述了一种实用的光谱仪，用于在30 Mc下观察高分辨率质子磁共振谱。进行场调制的方式是观察到``边带''响应，这使得可以使用锁定检测，从而提高了记录基线的稳定性。通过缓慢扫描调制频率来显示频谱，因此可以直接在频率上进行校准。射频源是质子控制的超再生振荡器，其频率遵循电磁场的变化。这减少了场漂移和不稳定性的影响，从而允许在记录光谱时使用相对较低的扫描速度。

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《Review of Scientific Instruments》 |1960年第2期|共4页
作者
Freeman R.; Pound R. V.;
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Centre d''Études Nucléares de Saclay, Gif‐sur‐Yvette, S. et O., France;

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1. Simulations of NMR experiments employing static and/or radio-frequency field gradients: Application to slice selection by the inhomogeneous radio-frequency field of a standard coil [J] . Canet D., Leclerc S., Rocher M., Applied Magnetic Resonance . 2002,第2期

机译：使用静态和/或射频场梯度进行NMR实验的模拟：通过标准线圈的不均匀射频场应用于切片选择
2. A magnetic field control system for a variable field NMR spectrometer. [J] . Callicott C Physics in medicine and biology. . 1999,第9期

机译：用于可变场NMR光谱仪的磁场控制系统。
3. Active elimination of radio frequency interference for improved signal-to-noise ratio for in-situ NMR experiments in strong magnetic field gradients [J] . M. Ibrahim, C.I. Pardi, T.W.C. Brown, Journal of magnetic resonance . 2018,第期

机译：激活消除射频干扰的改善信噪比：Italic> In-situ NMR实验的强磁场梯度
4. The Digital Field-Frequency Lock System of High-Resolution NMR Spectrometer [C] . Jiang Dezhi, Chen Haibo, Chen Zhong, International Conference on Electrical and Control Engineering . 2010

机译：高分辨率核磁共振谱仪的数字频率锁定系统
5. Suppression of nonlinear frequency sweeping of resonant interchange modes in a magnetic dipole with applied radio frequency fields. [D] . Maslovsky, Dmitry Anatolievich. 2003

机译：施加电磁场的电磁偶极子中共振交换模式的非线性扫频的抑制。
6. Electromagnetic Field and Radio Frequency Circuit Co-Simulation for Magnetic Resonance Imaging Dual-Tuned Radio Frequency Coils [O] . Nan Li, Shengping Liu, Xiaoqing Hu, -1

机译：磁共振成像双调谐射频线圈的电磁场和射频电路协同仿真
7. Design and Implementation of Field-frequency Lock Control System for High-resolution NMR Spectrometer [O] . 陈海波 2010

机译：高分辨率核磁共振谱仪场频锁定控制系统的设计与实现

High‐Resolution NMR Spectrometer with the Radio Frequency Controlled by the Magnetic Field

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