Controllable high voltage AC power supply

Abstract

The invention provides a controllable high-voltage alternating current power supply. The controllable high-voltage alternating current power supply is used for providing an electric field for an ion lens system in a mass spectrometer and comprises a digital-to-analog conversion module for providing a reference voltage, an alternating current amplitude adjusting module coupled with the digital-to-analog conversion module for outputting a first direct current voltage according to the reference voltage, a switching module coupled with the alternating current amplitude adjusting module for outputting a first alternating current voltage according to drive of the first direct current voltage, a transformer coupled with the switching module, a voltage division module coupled with the transformer, a detection module and an output end. The primary side of the switching module inputs the first alternating current voltage, and the secondary side of the switching module outputs a second alternating current voltage. The voltage division module is used for dividing the second alternating current voltage. The input end of the detection module is coupled with the voltage division module, the output end of the detection module is coupled with the alternating current amplitude adjusting module, and the detection module is used for feeding the voltage obtained after division of the second alternating current voltage through the voltage division module back to the alternating current amplitude adjusting module. The output end is coupled with the transformer and used for outputting the second alternating current voltage. By the adoption of the controllable high-voltage alternating current power supply, the electric field in the ion lens system is controlled in real time.

Description

Technical field [0001] The invention relates to an ion transmission system of a mass spectrometer, in particular to a controllable high-voltage AC power supply for providing an electric field to an ion lens. Background technique [0002] Inductively coupled plasma mass spectrometry (ICP-MS) is an analysis and testing technology that developed rapidly in the 1970s. Its principle is to use inductively coupled plasma to ionize the elements contained in the analysis sample into charged ions through an ion transmission system The charged ions are introduced into the mass analyzer and separated according to different mass-to-charge ratios. After the ion current is amplified by the detector, the measurement and control system processes the analysis results. Compared with other analytical techniques, ICP-MS has the advantages of low detection limit, wide linear range, and rapid simultaneous detection of various elements. With the expansion of the application range, ICP-MS has developed ...

AI Technical Summary

Problems solved by technology

[0008] In view of the above, it is necessary to propose a controllable high-voltage AC power supply for the existing lack of real-time control of the AC power supply.

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