Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources
Thermionic emission sources are key components of electron impact gas ion sources used in measuring instruments, such as mass spectrometers, ionization gauges, and apparatus for ionization cross-section measurements. The repeatability of the measurements taken with such instruments depends on the st...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/21/8/2878 |
| _version_ | 1827694697488842752 |
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| author | Jarosław Sikora Bartosz Kania Janusz Mroczka |
| author_facet | Jarosław Sikora Bartosz Kania Janusz Mroczka |
| author_sort | Jarosław Sikora |
| collection | DOAJ |
| description | Thermionic emission sources are key components of electron impact gas ion sources used in measuring instruments, such as mass spectrometers, ionization gauges, and apparatus for ionization cross-section measurements. The repeatability of the measurements taken with such instruments depends on the stability of the ion current, which is a function, among other things, of the electron beam current and electron accelerating voltage. In this paper, a laboratory thermionic electron beam current and accelerating voltage controller is presented, based on digital algorithm implementation. The average value of the percentage standard deviation of the emission current is 0.021%, and the maximum electron accelerating voltage change versus the emission current is smaller than 0.011% in the full operating range of the emission current. Its application as a trap current or emission current-regulated ion source power supply could be useful in many measuring instruments, such as in microelectromechanical system (MEMS) mass spectrometers as universal gas sensors, where a stable emission current and electron energy are needed. |
| first_indexed | 2024-03-10T12:09:31Z |
| format | Article |
| id | doaj.art-490e3bb9f00d430389dc8a363a000f2a |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T12:09:31Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-490e3bb9f00d430389dc8a363a000f2a2023-11-21T16:16:59ZengMDPI AGSensors1424-82202021-04-01218287810.3390/s21082878Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion SourcesJarosław Sikora0Bartosz Kania1Janusz Mroczka2Department of Automatics and Metrology, Lublin University of Technology, 20-618 Lublin, PolandDepartment of Automatics and Metrology, Lublin University of Technology, 20-618 Lublin, PolandDepartment of Electronic and Photonic Metrology, Wroclaw University of Science and Technology, 50-370 Wroclaw, PolandThermionic emission sources are key components of electron impact gas ion sources used in measuring instruments, such as mass spectrometers, ionization gauges, and apparatus for ionization cross-section measurements. The repeatability of the measurements taken with such instruments depends on the stability of the ion current, which is a function, among other things, of the electron beam current and electron accelerating voltage. In this paper, a laboratory thermionic electron beam current and accelerating voltage controller is presented, based on digital algorithm implementation. The average value of the percentage standard deviation of the emission current is 0.021%, and the maximum electron accelerating voltage change versus the emission current is smaller than 0.011% in the full operating range of the emission current. Its application as a trap current or emission current-regulated ion source power supply could be useful in many measuring instruments, such as in microelectromechanical system (MEMS) mass spectrometers as universal gas sensors, where a stable emission current and electron energy are needed.https://www.mdpi.com/1424-8220/21/8/2878thermionic emissionelectron accelerating voltageelectron beam currention currentcontrollerstandard deviation |
| spellingShingle | Jarosław Sikora Bartosz Kania Janusz Mroczka Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources Sensors thermionic emission electron accelerating voltage electron beam current ion current controller standard deviation |
| title | Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources |
| title_full | Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources |
| title_fullStr | Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources |
| title_full_unstemmed | Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources |
| title_short | Thermionic Electron Beam Current and Accelerating Voltage Controller for Gas Ion Sources |
| title_sort | thermionic electron beam current and accelerating voltage controller for gas ion sources |
| topic | thermionic emission electron accelerating voltage electron beam current ion current controller standard deviation |
| url | https://www.mdpi.com/1424-8220/21/8/2878 |
| work_keys_str_mv | AT jarosławsikora thermionicelectronbeamcurrentandacceleratingvoltagecontrollerforgasionsources AT bartoszkania thermionicelectronbeamcurrentandacceleratingvoltagecontrollerforgasionsources AT januszmroczka thermionicelectronbeamcurrentandacceleratingvoltagecontrollerforgasionsources |