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- Title
一种热电离质谱离子化器电源的研制.
- Authors
吴俊强; 刘桂方; 郭冬发; 李伯平
- Abstract
The ionizer power supply is a key device of the thermal ionization mass spectrometer, and its core lies in the suspension of high voltage on the output current for the purpose of ion repulsion after the sample is ionized. In this paper, in view of the independent development needs of thermal ionization mass spectrometer, a ionizer power supply was developed by multi-channel parallel connection of Howland current source circuit to improve the ability to output large currents, to use microcontrollers to achieve precision controllable output regulation of currents, and to achieve suspended high voltage on current by using high voltage isolation methods. After testing, the output current of this power supply is controllable and stable, and the fluctuation is small. In the self-developed thermal ionization mass spectrometer for system integration testing, the Sr standard substance was used in the experiments and the obtained 88Sr and 86Sr isotope ratio is 8.369 6 with the relative standard deviation RSD of 0.045%, and the relative error to the standard value of 0.064%, indicating that the designed ionizer power output is stable, can meet the needs of the thermal ionization mass spectrometer. At the same time, it can also provide technical support for the development of thermal ionization mass spectrometer, and has certain reference value in the design and application of thermal ionization mass spectrometer.
- Subjects
MASS spectrometers; POWER resources; ELECTRIC power; HIGH voltages; SYSTEM integration; MICROCONTROLLERS
- Publication
World Nuclear Geoscience, 2022, Vol 39, Issue 3, p571
- ISSN
1672-0636
- Publication type
Article
- DOI
10.3969/j.issn.1672-0636.2022.03.019