核四极矩共振探测系统研究进展

摘要

With the intensification of anti-terrorism situation , explosives detection systems have to meet a higher standard of performance and accuracy .Thus ,nuclear quadrupole detection system has drawn more and more at-tention for its higher accuracy and non-radioactivity compared to the conventional system .However ,the low SNR of received signals have long been an main barrier to its development .Firstly ,this paper explained the bas-ic modules of the Nuclear Quadrupole detection system and its operating principles .Then the recent progress to improve NQR detection system were reviewed on three key technologies :the probe ,Q switch and some other new technologies .Finally ,urgent problems and the development tendency were discussed .%随着反恐形势的加剧,对爆炸物探测系统的性能提出了更高的要求,核四极矩探测系统因具有较高的准确率、无放射性等优势,逐步走入人们视野.从核四极矩探测系统原理出发,总结了核四极矩探测系统的主要工作模块,从天线、Q值开关以及一些新的技术等方面综述了近年来为提高探测系统接收灵敏度所进行的改进,最后对有待研究的问题以及发展趋势进行了展望.