Controllable high voltage DC power supply

Abstract

The invention provides a controllable high-voltage direct current power supply which is used for providing an electric field for an ion lens system in a mass spectrometer. The controllable high-voltage direct current power supply comprises a digital-to-analog conversion module, a direct current high-voltage module, a voltage conditioning module, a filtration module, an output end, a voltage detection module, an analog-to-digital conversion module and a control module, wherein the digital-to-analog conversion module is used for providing reference voltages; the direct current high-voltage module is used for providing first direct current voltages; the voltage conditioning module is coupled with the digital-to-analog conversion module and the direct current high-voltage module and used for generating second direct current voltages according to the reference voltages and the first direct current voltages; the filtration module is coupled with the voltage conditioning module and used for filtering the second direct current voltages to generate third direct current voltages; the output end is coupled with the filtration module and used for outputting third direct current voltages; the voltage detection module is coupled with the output end and used for detecting the third direct current voltages in real time; the analog-to-digital conversion module is coupled with the voltage detection module and used for carrying out analog-to-digital conversion on the third direct current voltages detected by the voltage detection module; the control module is coupled with the digital-to-analog conversion module and the analog-to-digital conversion module and used for controlling the digital-to-analog conversion module according to input of the analog-to-digital conversion module so that the reference voltages can be provided.

Description

technical field [0001] The invention relates to an ion transmission system of a mass spectrometer, in particular to a controllable high-voltage direct current power supply for providing an electric field to an ion lens. Background technique [0002] Inductively coupled plasma mass spectrometry (ICP-MS) is an analytical and testing technology 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, and pass through the ion transmission system 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 and gives the analysis results. Compared with other analytical techniques, ICP-MS has the advantages of low detection limit, wide linear range, rapid and simultaneous detection of various elements, etc. With the expansion of the appl...

AI Technical Summary

Problems solved by technology

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

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