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Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources.
Jarosław Sikora1, Bartosz Kania1, Janusz Mroczka2
1Department of Automatics and Metrology, Lublin University of Technology, 20-618 Lublin, Poland.
Sensors (Basel, Switzerland)
|April 30, 2021
Summary
A new digital controller enhances the stability of thermionic electron emission current and accelerating voltage. This improves measurement repeatability in instruments like mass spectrometers and ionization gauges.
Area of Science:
- Physics
- Electrical Engineering
- Analytical Chemistry
Background:
- Thermionic emission sources are critical for electron impact gas ion sources.
- Instrument measurement repeatability relies on stable ion current, influenced by electron beam current and accelerating voltage.
Purpose of the Study:
- To present a laboratory controller for thermionic electron beam current and accelerating voltage.
- To enhance stability and repeatability in electron impact ion sources.
Main Methods:
- Implementation of a digital algorithm for precise control.
- Development of a laboratory-based controller system.
Main Results:
- Achieved an average percentage standard deviation of 0.021% for emission current.
- Demonstrated a maximum electron accelerating voltage change of less than 0.011% over the full emission current range.
Conclusions:
- The developed controller significantly improves the stability of electron beam current and accelerating voltage.
- This technology is valuable for various measuring instruments, including MEMS mass spectrometers and universal gas sensors.
Keywords:
controllerelectron accelerating voltageelectron beam currention currentstandard deviationthermionic emissionMore Related Videos
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