Design and Experimental Implementation of a Low Frequency Pulsed Magnetic Field Generator

被引：1

作者：

Gaunkar, Neelam Prabhu ^{[1
]}

Selvaraj, Jayaprakash ^{[1
]}

Bauer, Leif ^{[1
]}

Mina, Mani ^{[1
]}

Weber, Robert ^{[1
]}

Jiles, David ^{[1
]}

机构：

[1] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2017年 / 53卷 / 11期

关键词：

Electromagnetic delay; high speed switching; nuclear magnetic resonance (NMR); pulsed sinusoid; LASER;

D O I：

10.1109/TMAG.2017.2704081

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Pulsed magnetic field generation is a critical aspect of all nuclear magnetic resonance (NMR) experiments. In this paper, a novel design for a low field, low frequency (less than 5 MHz), pulsed magnetic field generation circuit suited for unilateral NMR applications is presented. A pulsed sinusoidal current is generated at an inductive load connected to an FET-based switch. The inductive load resonates at a frequency of approximately 2 MHz, which is also the precession frequency of H-1 protons in an external magnetic flux density of 500 G. The designed circuit can be tuned to operate at resonant frequencies of other chemical species as well. In this paper, the design parameters and operation of the prototype pulsed field generator will be discussed.

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