一种快速有效的核四极共振探头恢复方法

陈星; 徐更光

doi:10.7538/yzk.2009.43.05.0474

一种快速有效的核四极共振探头恢复方法

陈星,
徐更光

北京理工大学宇航科学技术学院,北京 100081

详细信息

中图分类号: TQ560
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出版历程
- 收稿日期: 2007-12-09
- 修回日期: 2008-03-20
- 刊出日期: 2009-05-19

An Efficient Fast Recovery Scheme for Nuclear Quadrupole Resonance Single Coil Probe

School of Aerospace Science and Engineering,Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 介绍了一种用于主动减小核四极共振（NQR）探头恢复时间的Q值变换电路，它利用MOSFET控制变Q电路与探头电路的耦合，并通过变压器增加与电感线圈串联的阻抗值以达到改变Q值的目的。此电路不产生新的振铃，对接收NQR的分辨率也不造成损失。实验结果表明，电路能有效缩短探头的恢复时间，同时还可提高信噪比。
- 变Q电路 ,
- 核四极共振 ,
- 恢复时间
Abstract: An active Q-switching circuit using a transformer for reducing probe recovery time just after the RF excitation was described. MOSFET controls the coupling and uncoupling to the Q-switching circuit from the probe. It doesn’t create new ringing and doesn’t operate during the reception of nuclear quadrupole resonance signal and there’s no loss in sensitivity. Experimental results prove that the probe recovery time is reduced and SNR is increased by this circuit.
- Q-switching circuit ,
- nuclear quadrupole resonance ,
- recovery time

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参考文献(10)

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[2]	石光明,徐更光,王廷增，等.核四极共振在炸药探测上的应用[J]. 火炸药学报, 2004, 27(3):70-73. SHI Guangming, XU Gengguang, WANG Tingzeng, et al. Applications of nuclear quadrupole resonance in explosives detection[J]. Chinese Journal of Explosives & Propellants, 2004, 27(3): 70-73（in Chinese）.
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一种快速有效的核四极共振探头恢复方法

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出版历程

An Efficient Fast Recovery Scheme for Nuclear Quadrupole Resonance Single Coil Probe

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