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| Design of a Data Acquisition System for Time-of-flight Mass Spectrometer |
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| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:time-of-flight mass spectrometer time to digital converter（TDC） data acquisition FPGA |
| Author | Institution |
| GUO Jing,LONG Tao,BAO Ze-min,WANG Pei-zhi,TIAN Di*,LIU Dun-yi |
1.吉林大学仪器科学与电气工程学院;2.中国地质科学院地质研究所北京离子探针中心 |
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| Abstract: |
| As the high resolution and wide mass measurement range characteristics of a time-of-flight mass spectrometer,a high precision and wide range data acquisition system was designed in this paper.The system completed the amplification,discrimination and level conversion for the front end signal.A high precision time interval measuring chip TDC-GPX was used to measure the pulses’ time interval.A field programmable gate array（FPGA） realized the sequential control.A Universal Serial Bus（USB 2.0） interfaced with a computer.The host computer’s controlment and high-speed data transmission were realized with the time division multiplexing technology.Testing results showed that the single-shot precision is less than 100 ps,the range of measurement time is beyond of 500 μs and the number of measurement channels could be up to 8. |
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