Design of a Compact Time-of-Flight Mass Spectrometer for Space Application
Design of a Compact Time-of-Flight Mass Spectrometer for Space Application
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空间应用紧凑型飞行时间质谱仪的设计
DOI：
10.1021/jasms.9b00092
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发表时间：
2020
影响因子：
3.2
通讯作者：
Huang Zhengxu
中科院分区：
文献类型：
--
作者：
Ren Zhengyi;Guo Meiru;Cheng Yongjun;Sun Wenjun;Li Gang;Dong Meng;Li Yali;Xi Zhenhua;Pei Xiaoqiang;Niu Hongzhi;Tan Guobin;Zhou Zhen;Huang Zhengxu
微型反射式飞行时间质谱仪(TOF-MS)可用于行星环境中气体成分的原位分析。然而，质量分辨率、灵敏度、检测限、质量量程和质量精度等性能往往会因为小型化而降低。为此，研制了一种紧凑型空间应用仪器，并对其性能进行了评价。飞行时间质谱仪的质量为13.4 kg，尺寸为300 mm×200 mm×200 mm，功耗为25W。质量范围的上限大于500amu，目前在小型飞行时间质谱仪上获得的最好分辨率在全宽半高(FWHM)时约为405，并测定了仪器的其他性能指标，其中最坏的质量稳定性为0.49%，质量精度为0.12%，灵敏度为0.6 mV/ppm。
A miniature reflectron time-of-flight mass spectrometer (TOF MS) with orthogonal extraction coupled with electron impact (EI) ionization source can be used to perform in situ gas composition analysis in a planetary environment. However, performances such as the mass resolution, sensitivity, limit of detection, mass range, and mass accuracy are often decreased because of miniaturization. Herein, a compact instrument for space applications has been developed, and its performance has been evaluated. The mass of the TOF MS is 13.4 kg, with dimensions of 300 mm × 200 mm × 200 mm, and the power consumption is 25 W. In this paper, the design of the ion source, mass analyzer, and detector is discussed in detail. The upper limit of the mass range is greater than 500 amu, and the best resolving power obtained so far on the miniature TOF MS is around 405 at full width half maximum (FWHM); other performance indexes of the instrument are also determined, where the worst case for mass stability is 0.49%, together with a mass accuracy of 0.12% and a sensitivity of 0.6 mV/ppm.