Determination of Plasma Potential Using an Emissive Probe with Floating Potential Method
Despite over 90 years of study on the emissive probe, a plasma diagnostic tool used to measure plasma potential, its underlying physics has yet to be fully understood. In this study, we investigated the voltages along the hot filament wire and emitting thermal electrons and proved which voltage refl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/7/2762 |
| _version_ | 1797607556386914304 |
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| author | Chulhee Cho Sijun Kim Youngseok Lee Inho Seong Wonnyoung Jeong Yebin You Minsu Choi Shinjae You |
| author_facet | Chulhee Cho Sijun Kim Youngseok Lee Inho Seong Wonnyoung Jeong Yebin You Minsu Choi Shinjae You |
| author_sort | Chulhee Cho |
| collection | DOAJ |
| description | Despite over 90 years of study on the emissive probe, a plasma diagnostic tool used to measure plasma potential, its underlying physics has yet to be fully understood. In this study, we investigated the voltages along the hot filament wire and emitting thermal electrons and proved which voltage reflects the plasma potential. Using a circuit model incorporating the floating condition, we found that the lowest potential on the plasma-exposed filament provides a close approximation of the plasma potential. This theoretical result was verified with a comparison of emissive probe measurements and Langmuir probe measurements in inductively coupled plasma. This work provides a significant contribution to the accurate measurement of plasma potential using the emissive probe with the floating potential method. |
| first_indexed | 2024-03-11T05:31:35Z |
| format | Article |
| id | doaj.art-3c4c1867577448b883d73f9d14d3e120 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T05:31:35Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-3c4c1867577448b883d73f9d14d3e1202023-11-17T17:04:44ZengMDPI AGMaterials1996-19442023-03-01167276210.3390/ma16072762Determination of Plasma Potential Using an Emissive Probe with Floating Potential MethodChulhee Cho0Sijun Kim1Youngseok Lee2Inho Seong3Wonnyoung Jeong4Yebin You5Minsu Choi6Shinjae You7Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaApplied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaApplied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaApplied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaApplied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaApplied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaApplied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaApplied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Republic of KoreaDespite over 90 years of study on the emissive probe, a plasma diagnostic tool used to measure plasma potential, its underlying physics has yet to be fully understood. In this study, we investigated the voltages along the hot filament wire and emitting thermal electrons and proved which voltage reflects the plasma potential. Using a circuit model incorporating the floating condition, we found that the lowest potential on the plasma-exposed filament provides a close approximation of the plasma potential. This theoretical result was verified with a comparison of emissive probe measurements and Langmuir probe measurements in inductively coupled plasma. This work provides a significant contribution to the accurate measurement of plasma potential using the emissive probe with the floating potential method.https://www.mdpi.com/1996-1944/16/7/2762plasma diagnosticsplasma potentialemissive probefloating potential methodplasma potential determination |
| spellingShingle | Chulhee Cho Sijun Kim Youngseok Lee Inho Seong Wonnyoung Jeong Yebin You Minsu Choi Shinjae You Determination of Plasma Potential Using an Emissive Probe with Floating Potential Method Materials plasma diagnostics plasma potential emissive probe floating potential method plasma potential determination |
| title | Determination of Plasma Potential Using an Emissive Probe with Floating Potential Method |
| title_full | Determination of Plasma Potential Using an Emissive Probe with Floating Potential Method |
| title_fullStr | Determination of Plasma Potential Using an Emissive Probe with Floating Potential Method |
| title_full_unstemmed | Determination of Plasma Potential Using an Emissive Probe with Floating Potential Method |
| title_short | Determination of Plasma Potential Using an Emissive Probe with Floating Potential Method |
| title_sort | determination of plasma potential using an emissive probe with floating potential method |
| topic | plasma diagnostics plasma potential emissive probe floating potential method plasma potential determination |
| url | https://www.mdpi.com/1996-1944/16/7/2762 |
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