The first application of flush probe arrays on HL-3 tokamak
Newly flush-mounted Langmuir probe arrays are fabricated and applied in the HL-3 tokamak to investigate its advanced divertor physics such as snowflake and tripod divertors. Three sets of flush probe arrays are installed on toroidal ports 4, 10 and 18. Each port has 43 × 4 = 172 probe tips, which ar...
Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
|
| Series: | Nuclear Materials and Energy |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179125000328 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832540420061528064 |
|---|---|
| author | Z.H. Huang L.W. Yan K.Y. Yi Na Wu W.J. Chen W.C. Wang Yu He J. Chen J. Cheng W. Zhao J.M. Gao L. Nie Z.B. Shi X.Q. Ji W.L. Zhong |
| author_facet | Z.H. Huang L.W. Yan K.Y. Yi Na Wu W.J. Chen W.C. Wang Yu He J. Chen J. Cheng W. Zhao J.M. Gao L. Nie Z.B. Shi X.Q. Ji W.L. Zhong |
| author_sort | Z.H. Huang |
| collection | DOAJ |
| description | Newly flush-mounted Langmuir probe arrays are fabricated and applied in the HL-3 tokamak to investigate its advanced divertor physics such as snowflake and tripod divertors. Three sets of flush probe arrays are installed on toroidal ports 4, 10 and 18. Each port has 43 × 4 = 172 probe tips, which are composed of 43 triple and single probe arrays. Each array consists of 4 tips with the same major radius and height. A total of 516 CFC (carbon fiber composite) tips with diameter of dp = 4 mm are mounted at 3 ports. Their minimum spatial separation is 1.8 cm poloidally, while temporal resolution for ion saturation currents is 1 μs. The toroidal separation of a triple probe is 1.8 ∼ 3.8 cm or 10.2 ∼ 14.8 cm. It gradually increases with major radius. A novel design of ceramic isolation ring with a labyrinth can ensure reliable electrical insulation between the CFC tip and the divertor target plate where plasma dust and impurities are continuously deposited into their gaps due to long experimental operation. A large spring washer improves the heat conduction from each tip through a ceramic insulator into a cooled divertor copper plate. Every probe body is embedded into a divertor plate then brazed to a copper wire to ensure good electrical connection, and finally fixed on a stainless-steel support. Forty-three signal wires at the same toroidal angle are combined into a manifold copper tube to vacuum feedthrough, which can dramatically shield noise and resist the high baking temperature of 300 °C. Moreover, the discharge monitoring and mode conversion between the triple and single probes could be freely performed via a remote-control workstation. The first application results indicate that the target probe arrays can measure highly temporal plasma parameters, including electron temperature and density, particle and heat fluxes in H-mode discharges on HL-3 tokamak. The tripod divertor configuration has been confirmed by the new flush probe arrays. |
| format | Article |
| id | doaj-art-c123e5dfd3484a95a4128ed6089d406a |
| institution | Kabale University |
| issn | 2352-1791 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-c123e5dfd3484a95a4128ed6089d406a2025-02-05T04:32:10ZengElsevierNuclear Materials and Energy2352-17912025-03-0142101892The first application of flush probe arrays on HL-3 tokamakZ.H. Huang0L.W. Yan1K.Y. Yi2Na Wu3W.J. Chen4W.C. Wang5Yu He6J. Chen7J. Cheng8W. Zhao9J.M. Gao10L. Nie11Z.B. Shi12X.Q. Ji13W.L. Zhong14Southwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, China; Corresponding author.Southwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwest Jiaotong University, Chengdu, Sichuan 610031, ChinaSouthwest Jiaotong University, Chengdu, Sichuan 610031, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaSouthwestern Institute of Physics, Chengdu, Sichuan 610225, ChinaNewly flush-mounted Langmuir probe arrays are fabricated and applied in the HL-3 tokamak to investigate its advanced divertor physics such as snowflake and tripod divertors. Three sets of flush probe arrays are installed on toroidal ports 4, 10 and 18. Each port has 43 × 4 = 172 probe tips, which are composed of 43 triple and single probe arrays. Each array consists of 4 tips with the same major radius and height. A total of 516 CFC (carbon fiber composite) tips with diameter of dp = 4 mm are mounted at 3 ports. Their minimum spatial separation is 1.8 cm poloidally, while temporal resolution for ion saturation currents is 1 μs. The toroidal separation of a triple probe is 1.8 ∼ 3.8 cm or 10.2 ∼ 14.8 cm. It gradually increases with major radius. A novel design of ceramic isolation ring with a labyrinth can ensure reliable electrical insulation between the CFC tip and the divertor target plate where plasma dust and impurities are continuously deposited into their gaps due to long experimental operation. A large spring washer improves the heat conduction from each tip through a ceramic insulator into a cooled divertor copper plate. Every probe body is embedded into a divertor plate then brazed to a copper wire to ensure good electrical connection, and finally fixed on a stainless-steel support. Forty-three signal wires at the same toroidal angle are combined into a manifold copper tube to vacuum feedthrough, which can dramatically shield noise and resist the high baking temperature of 300 °C. Moreover, the discharge monitoring and mode conversion between the triple and single probes could be freely performed via a remote-control workstation. The first application results indicate that the target probe arrays can measure highly temporal plasma parameters, including electron temperature and density, particle and heat fluxes in H-mode discharges on HL-3 tokamak. The tripod divertor configuration has been confirmed by the new flush probe arrays.http://www.sciencedirect.com/science/article/pii/S2352179125000328Flush probe arrayTripod divertorH-modeHL-3 tokamak |
| spellingShingle | Z.H. Huang L.W. Yan K.Y. Yi Na Wu W.J. Chen W.C. Wang Yu He J. Chen J. Cheng W. Zhao J.M. Gao L. Nie Z.B. Shi X.Q. Ji W.L. Zhong The first application of flush probe arrays on HL-3 tokamak Nuclear Materials and Energy Flush probe array Tripod divertor H-mode HL-3 tokamak |
| title | The first application of flush probe arrays on HL-3 tokamak |
| title_full | The first application of flush probe arrays on HL-3 tokamak |
| title_fullStr | The first application of flush probe arrays on HL-3 tokamak |
| title_full_unstemmed | The first application of flush probe arrays on HL-3 tokamak |
| title_short | The first application of flush probe arrays on HL-3 tokamak |
| title_sort | first application of flush probe arrays on hl 3 tokamak |
| topic | Flush probe array Tripod divertor H-mode HL-3 tokamak |
| url | http://www.sciencedirect.com/science/article/pii/S2352179125000328 |
| work_keys_str_mv | AT zhhuang thefirstapplicationofflushprobearraysonhl3tokamak AT lwyan thefirstapplicationofflushprobearraysonhl3tokamak AT kyyi thefirstapplicationofflushprobearraysonhl3tokamak AT nawu thefirstapplicationofflushprobearraysonhl3tokamak AT wjchen thefirstapplicationofflushprobearraysonhl3tokamak AT wcwang thefirstapplicationofflushprobearraysonhl3tokamak AT yuhe thefirstapplicationofflushprobearraysonhl3tokamak AT jchen thefirstapplicationofflushprobearraysonhl3tokamak AT jcheng thefirstapplicationofflushprobearraysonhl3tokamak AT wzhao thefirstapplicationofflushprobearraysonhl3tokamak AT jmgao thefirstapplicationofflushprobearraysonhl3tokamak AT lnie thefirstapplicationofflushprobearraysonhl3tokamak AT zbshi thefirstapplicationofflushprobearraysonhl3tokamak AT xqji thefirstapplicationofflushprobearraysonhl3tokamak AT wlzhong thefirstapplicationofflushprobearraysonhl3tokamak AT zhhuang firstapplicationofflushprobearraysonhl3tokamak AT lwyan firstapplicationofflushprobearraysonhl3tokamak AT kyyi firstapplicationofflushprobearraysonhl3tokamak AT nawu firstapplicationofflushprobearraysonhl3tokamak AT wjchen firstapplicationofflushprobearraysonhl3tokamak AT wcwang firstapplicationofflushprobearraysonhl3tokamak AT yuhe firstapplicationofflushprobearraysonhl3tokamak AT jchen firstapplicationofflushprobearraysonhl3tokamak AT jcheng firstapplicationofflushprobearraysonhl3tokamak AT wzhao firstapplicationofflushprobearraysonhl3tokamak AT jmgao firstapplicationofflushprobearraysonhl3tokamak AT lnie firstapplicationofflushprobearraysonhl3tokamak AT zbshi firstapplicationofflushprobearraysonhl3tokamak AT xqji firstapplicationofflushprobearraysonhl3tokamak AT wlzhong firstapplicationofflushprobearraysonhl3tokamak |