Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamak
In this paper, the plasma parameters of hydrogen glow discharge were measured using Langmuir probe system. To measure these parameters in Damavand tokamak, different parts of the Langmuir probe were designed and fabricated. The electrode used in this system is a tungsten wire with diameter and lengt...
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| Format: | Article |
| Language: | fas |
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Nuclear Science and Technology Research Institute
2021-04-01
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| Series: | مجله علوم و فنون هستهای |
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| Online Access: | https://jonsat.nstri.ir/article_1181_da2558ef86516e6916b295b570aa066f.pdf |
| _version_ | 1797835405112901632 |
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| author | F. Sedighi A. Koohi Ch. Rasouli D. Iraji H. Rasouli |
| author_facet | F. Sedighi A. Koohi Ch. Rasouli D. Iraji H. Rasouli |
| author_sort | F. Sedighi |
| collection | DOAJ |
| description | In this paper, the plasma parameters of hydrogen glow discharge were measured using Langmuir probe system. To measure these parameters in Damavand tokamak, different parts of the Langmuir probe were designed and fabricated. The electrode used in this system is a tungsten wire with diameter and length of 0.1 and 6 mm, respectively. The electrical circuit constructed for this system is capable of supplying voltage and current in the order of 400 V and 1 A, and can produce triangular pulses in the frequency range of 10 Hz to 10 kHz, respectively. Glow discharge hydrogen plasma, which is used for vacuum vessel cleaning and conditioning, is produced by two electrodes located in the lower part of the Damavand tokamak with the voltage of 450 V, current of 1.5 A and pressure of 10-3 Torr. By applying voltage to the electrode of probe, in the range of 200 to 350 V, the current drawn from the probe was measured. By interpreting the current-voltage characteristic, the plasma parameters were determined. The electron temperature, plasma density, plasma potential, and Debye length of the hydrogen glow discharge measured using this system are 5.8e V, 1.17×1015 m-3, 236 V and 523 μm, respectively. |
| first_indexed | 2024-04-09T14:53:32Z |
| format | Article |
| id | doaj.art-b0f204cb146c4c0296653029bfb6e1c8 |
| institution | Directory Open Access Journal |
| issn | 1735-1871 2676-5861 |
| language | fas |
| last_indexed | 2024-04-09T14:53:32Z |
| publishDate | 2021-04-01 |
| publisher | Nuclear Science and Technology Research Institute |
| record_format | Article |
| series | مجله علوم و فنون هستهای |
| spelling | doaj.art-b0f204cb146c4c0296653029bfb6e1c82023-05-02T09:06:29ZfasNuclear Science and Technology Research Instituteمجله علوم و فنون هستهای1735-18712676-58612021-04-01421212910.24200/nst.2021.11811181Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamakF. Sedighi0A. Koohi1Ch. Rasouli2D. Iraji3H. Rasouli4Plasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.BOX:14399-51113, Tehran, IranPlasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.BOX:14399-51113, Tehran, IranPlasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.BOX:14399-51113, Tehran, IranDepartment of the Energy Engineering and Physics, Amirkabir University of Technology, P.O. Box: 15875-4413, Tehran, IranPlasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.BOX:14399-51113, Tehran, IranIn this paper, the plasma parameters of hydrogen glow discharge were measured using Langmuir probe system. To measure these parameters in Damavand tokamak, different parts of the Langmuir probe were designed and fabricated. The electrode used in this system is a tungsten wire with diameter and length of 0.1 and 6 mm, respectively. The electrical circuit constructed for this system is capable of supplying voltage and current in the order of 400 V and 1 A, and can produce triangular pulses in the frequency range of 10 Hz to 10 kHz, respectively. Glow discharge hydrogen plasma, which is used for vacuum vessel cleaning and conditioning, is produced by two electrodes located in the lower part of the Damavand tokamak with the voltage of 450 V, current of 1.5 A and pressure of 10-3 Torr. By applying voltage to the electrode of probe, in the range of 200 to 350 V, the current drawn from the probe was measured. By interpreting the current-voltage characteristic, the plasma parameters were determined. The electron temperature, plasma density, plasma potential, and Debye length of the hydrogen glow discharge measured using this system are 5.8e V, 1.17×1015 m-3, 236 V and 523 μm, respectively.https://jonsat.nstri.ir/article_1181_da2558ef86516e6916b295b570aa066f.pdfglow dischargetokamaklangmuir probeelectron temperatureplasma density |
| spellingShingle | F. Sedighi A. Koohi Ch. Rasouli D. Iraji H. Rasouli Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamak مجله علوم و فنون هستهای glow discharge tokamak langmuir probe electron temperature plasma density |
| title | Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamak |
| title_full | Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamak |
| title_fullStr | Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamak |
| title_full_unstemmed | Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamak |
| title_short | Design and fabrication of Langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of Damavand tokamak |
| title_sort | design and fabrication of langmuir probe system for determination of glow discharge parameters for vacuum vessel conditioning of damavand tokamak |
| topic | glow discharge tokamak langmuir probe electron temperature plasma density |
| url | https://jonsat.nstri.ir/article_1181_da2558ef86516e6916b295b570aa066f.pdf |
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