一种快速有效的核四极共振探头恢复方法

陈星, 徐更光

陈星, 徐更光. 一种快速有效的核四极共振探头恢复方法[J]. 原子能科学技术, 2009, 43(5): 474-476. DOI: 10.7538/yzk.2009.43.05.0474
引用本文: 陈星, 徐更光. 一种快速有效的核四极共振探头恢复方法[J]. 原子能科学技术, 2009, 43(5): 474-476. DOI: 10.7538/yzk.2009.43.05.0474
CHEN Xing, XU Geng-guang. An Efficient Fast Recovery Scheme for Nuclear Quadrupole Resonance Single Coil Probe[J]. Atomic Energy Science and Technology, 2009, 43(5): 474-476. DOI: 10.7538/yzk.2009.43.05.0474
Citation: CHEN Xing, XU Geng-guang. An Efficient Fast Recovery Scheme for Nuclear Quadrupole Resonance Single Coil Probe[J]. Atomic Energy Science and Technology, 2009, 43(5): 474-476. 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

详细信息
  • 中图分类号: TQ560

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

  • 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。

     

    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.

     

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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

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