NQR炸药探测系统中射频线圈的设计研究

Design of the Radio Frequency Coil in a Nuclear Quadrupole Resonance(NQR)Explosive Detection System

基于核四极矩共振(Nuclear Quadrupole Resonance,NQR)炸药探测原理,对探测系统中拾取信号的关键部件射频线圈进行了优化设计,并确定了小型螺线管型线圈的直径、长度和匝数.试验测试表明,此线圈射频场均匀性好、信噪比大、灵敏度高,可以快速准确探测到NQR信号,验证了线圈设计理论的有效性和制作方法的可行性.该设计方法对提高隐藏炸药探测的准确率以及不同试验条件下射频线圈的设计具有重要意义.

The radio frequency （RF） coil is a key component in the nuclear quadrupole resonance （NQR） explosive detection system to pick up the signals.In this study,we aimed to optimize the design of small-sized solenoid coils for NQR explosive detection,including the diameter,length and number of turns of the coil.Experimental tests showed that the optimized coil had high sensitivity,and could be used to detect the NQR signals of explosives quickly and accurately.