Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LD
The linear plasma devices (LPDs) can provide a good platform to experimentally simulate the divertor physics. MPS-LD is a new LPD, which uses ion cyclotron resonance heating (ICRH) to raise the ion temperature ( T _i ). In this work, the helium plasma transport experiments with/without ICRH are carr...
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IOP Publishing
2025-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/adc3a8 |
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| author | Changjiang Sun Yanjie Zhang Chaofeng Sang Jintao Wu Shuaishuai Gao Yao Peng Hao Wang Chongyang Jin Yue Wang Qi Wang Dezhen Wang |
| author_facet | Changjiang Sun Yanjie Zhang Chaofeng Sang Jintao Wu Shuaishuai Gao Yao Peng Hao Wang Chongyang Jin Yue Wang Qi Wang Dezhen Wang |
| author_sort | Changjiang Sun |
| collection | DOAJ |
| description | The linear plasma devices (LPDs) can provide a good platform to experimentally simulate the divertor physics. MPS-LD is a new LPD, which uses ion cyclotron resonance heating (ICRH) to raise the ion temperature ( T _i ). In this work, the helium plasma transport experiments with/without ICRH are carried out, and the corresponding plasma transport modeling is performed by using SOLPS-ITER to study the effects of charge-exchange (CX) collisions and helium atomic density ( n _He ) on ICRH, to optimize the heating efficiency. The ion energy is diagnosed by self-developed retarding potential analyzer (RPA). Firstly, the SOLPS-ITER simulation without ICRH is benchmarked with the experimental results, showing well agreement. Subsequently, T _i with ICRH is measured by using RPA, and corresponding plasma transport modeling with ICRH is carried out. The experimental and simulation results show that T _i increases almost linearly with ICRH power. When the ICRH power is 10 kW, T _i can reach approximately a dozen eV at the axis, and higher at the outer boundary, but near the target T _i is still around 1 eV. Next, the optimization of ICRH efficiency is further studied by SOLPS-ITER, and the significant effect of enhanced CX collision rate on preventing T _i raising is soundly demonstrated. This reveals the necessity of reducing ${n_{{\text{He}}}}$ in the heating region. Finally, the SOLPS-ITER simulation reveals that when differential pumping is applied, the closer the skimmer is to the plasma, the more effectively the ${{{n}}_{\text{He}}}$ in the auxiliary heating region can be reduced. The relationship that ${n_{{\text{He}}}}$ affects T _i by influencing the charge-exchange collisions source is confirmed. Moreover, the corresponding relationship between different CX collision rate and ${n_{{\text{He}}}}$ is discovered. The present work provides a potential way to optimize ICRH to realize high heating efficiency in future work. |
| format | Article |
| id | doaj-art-094645a3b88f4c90b431ef8f8a1d2cd6 |
| institution | DOAJ |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-094645a3b88f4c90b431ef8f8a1d2cd62025-08-20T02:53:50ZengIOP PublishingNuclear Fusion0029-55152025-01-0165505600710.1088/1741-4326/adc3a8Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LDChangjiang Sun0Yanjie Zhang1https://orcid.org/0000-0002-5188-0576Chaofeng Sang2https://orcid.org/0000-0002-6861-5242Jintao Wu3https://orcid.org/0009-0001-0026-8491Shuaishuai Gao4Yao Peng5Hao Wang6Chongyang Jin7Yue Wang8Qi Wang9Dezhen Wang10https://orcid.org/0000-0003-0517-7318Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology , Dalian 116024, ChinaThe linear plasma devices (LPDs) can provide a good platform to experimentally simulate the divertor physics. MPS-LD is a new LPD, which uses ion cyclotron resonance heating (ICRH) to raise the ion temperature ( T _i ). In this work, the helium plasma transport experiments with/without ICRH are carried out, and the corresponding plasma transport modeling is performed by using SOLPS-ITER to study the effects of charge-exchange (CX) collisions and helium atomic density ( n _He ) on ICRH, to optimize the heating efficiency. The ion energy is diagnosed by self-developed retarding potential analyzer (RPA). Firstly, the SOLPS-ITER simulation without ICRH is benchmarked with the experimental results, showing well agreement. Subsequently, T _i with ICRH is measured by using RPA, and corresponding plasma transport modeling with ICRH is carried out. The experimental and simulation results show that T _i increases almost linearly with ICRH power. When the ICRH power is 10 kW, T _i can reach approximately a dozen eV at the axis, and higher at the outer boundary, but near the target T _i is still around 1 eV. Next, the optimization of ICRH efficiency is further studied by SOLPS-ITER, and the significant effect of enhanced CX collision rate on preventing T _i raising is soundly demonstrated. This reveals the necessity of reducing ${n_{{\text{He}}}}$ in the heating region. Finally, the SOLPS-ITER simulation reveals that when differential pumping is applied, the closer the skimmer is to the plasma, the more effectively the ${{{n}}_{\text{He}}}$ in the auxiliary heating region can be reduced. The relationship that ${n_{{\text{He}}}}$ affects T _i by influencing the charge-exchange collisions source is confirmed. Moreover, the corresponding relationship between different CX collision rate and ${n_{{\text{He}}}}$ is discovered. The present work provides a potential way to optimize ICRH to realize high heating efficiency in future work.https://doi.org/10.1088/1741-4326/adc3a8plasma transportICRHSOLPS-ITERcharge-exchange collisiondifferential pumping |
| spellingShingle | Changjiang Sun Yanjie Zhang Chaofeng Sang Jintao Wu Shuaishuai Gao Yao Peng Hao Wang Chongyang Jin Yue Wang Qi Wang Dezhen Wang Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LD Nuclear Fusion plasma transport ICRH SOLPS-ITER charge-exchange collision differential pumping |
| title | Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LD |
| title_full | Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LD |
| title_fullStr | Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LD |
| title_full_unstemmed | Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LD |
| title_short | Experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in MPS-LD |
| title_sort | experimental and simulation study of helium plasma transport during ion cyclotron resonance heating in mps ld |
| topic | plasma transport ICRH SOLPS-ITER charge-exchange collision differential pumping |
| url | https://doi.org/10.1088/1741-4326/adc3a8 |
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