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基于离子阱原理的空间小型质谱仪理论模拟研究
引用本文:马雪佳,谭超,杨先卫,鲁广铎,罗志会,许云丽,潘礼庆,郑胜,赵华.基于离子阱原理的空间小型质谱仪理论模拟研究[J].质谱学报,2015,36(2):162-167.
作者姓名:马雪佳  谭超  杨先卫  鲁广铎  罗志会  许云丽  潘礼庆  郑胜  赵华
作者单位:三峡大学磁电子与纳磁探测研究所,湖北 宜昌443002
基金项目:宜昌市科学技术与开发项目(A2012-302-26,A13-302a-01)资助
摘    要:当前空间探测活动日益频繁,其中对空间有机分子的探测是空间探测的一项重要任务。由于太空中特殊的工作条件,一般商品质谱仪的体积、功耗和分析能力等都不能满足要求,因此需要研发小体积、低功耗、高稳定性的质谱仪。本研究基于离子阱原理,提出了由多个环形电极构成的新型平方离子阱,这种多环高压结构能有效减小离子阱的体积,从而实现质谱仪器的小型化。通过采用成比例的直流电压分时段供电,成功扩展了该质谱仪的离子检测范围。经仿真计算,拟合出了离子振荡频率与其质量数的关系。该质谱仪对质量数在1~2 000u范围内的分子,质量分辨大于1 400,能够满足空间大分子质量分辨的基本要求。

关 键 词:质谱仪  环形电极  离子阱  振荡周期  

Theoretical Simulation of Spatial Miniature Mass Spectrometer Based on Ion Trap Principle
MA Xue-jia,TAN Chao,YANG Xian-wei,LU Guang-duo,LUO Zhi-hui,XU Yun-li,PAN Li-qing,ZHENG Sheng,ZHAO Hua.Theoretical Simulation of Spatial Miniature Mass Spectrometer Based on Ion Trap Principle[J].Journal of Chinese Mass Spectrometry Society,2015,36(2):162-167.
Authors:MA Xue-jia  TAN Chao  YANG Xian-wei  LU Guang-duo  LUO Zhi-hui  XU Yun-li  PAN Li-qing  ZHENG Sheng  ZHAO Hua
Affiliation:Research Institute for Magnetoelectronics, China Three Gorges University, Yichang 443002, China
Abstract:Current space exploration activities have become increasingly frequent, particularly organic molecules in space exploration is an important task. Due to the special working conditions in space, the general merchandise mass spectrometer can’t meet the requirements such as volume, power consumption and analysis ability. So this need to research and development a mass spectrometer with compact size, low power consumption and high stability. In this study, a new type square ion trap formed multiple circular electrode was put forward base on the principle of ion trap. Such polycyclic pressure structure can effectively reduce the volume of the ion trap, so as to realize the miniaturization of mass spectrometer instrument. Power supply by using DC voltage of the composition ratio sub-period, the detection of mass spectrometer was expanded successfully. Through the simulation calculation,  the relationship of ion oscillation frequency and its mass number was fitted. The mass resolution of the mass spectrometer is greater than 1400 for the mass number from 1 to 2000 u, which can meet the basic requirement of high molecular mass resolution.
Keywords:mass spectrometer  annular electrode  ion trap  oscillation frequency
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