新型FT-IMS传感器研制

Development of New Sensor of Fourier Transform Spectrometry

傅里叶变换离子迁移谱技术通过提高离子利用率,使检测结果信噪比提高,且不影响分辨率.设计了新型傅里叶变换离子迁移谱传感器,将其中的第二级离子门移出漂移管外实现.介绍傅里叶变换离子迁移谱集成检测系统的工作原理,优化了传感器结构参数,分析了离子门的实现和具体电路设计方法,阐述了离子门控制信号的软件设计过程.搭建了由此传感器组成的检测平台进行实验,分别与未经信号处理的传统离子迁移谱仪检测结果以及计算机仿真结果进行对比.实验结果表明,设计的新型FT-IMS传感器组成的检测平台较传统离子迁移谱仪的检测结果信噪比存在明显提升.

Fourier transform ion mobility spectrometry increases the signal-to-noise ratio of testing results by improving the ion utilization rate, but will not reduce the resolution. A new sensor of Fourier Transform Spectrometry was designed, the second ion gate was removed from the drift tube. The working principle of FT-IMS system was introduced, and the structure parameters of FT-IMS sensor were optimized. The design of sensor structure was studied. The realization of second ion gate and the method of circuit design were explicated. The software design process of signal controling the ion gate was elaborated. A detecting platform with the sensor of FT-IMS was built for experiments, that the detection result will be contrasted with the results of untreated traditional ion mobility spectrometry and computer simulation respectively. The results showed that the circuit can achieve the function of the second ion gate out of the drift tube, and comparing with the traditional ion mobility spectrometry, the SNR of FT-IMS detecting platform is improved significantly.