Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST
Controlling the splitting divertor heat flux caused by resonant magnetic perturbations (RMPs) is a topic of concern for fusion devices. As a fundamental prerequisite, it is necessary to understand the characteristics of the heat flux distribution under the applied RMP field, which will be studied in...
Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | Nuclear Fusion |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1741-4326/ad9b38 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841558604265553920 |
|---|---|
| author | Ruirong Liang Xianzu Gong Bin Zhang Manni Jia Hua Yang Qun Ma Youwen Sun Zhendong Yang Yunchan Hu Zuhao Wang Wei Wang Yutong Guo Jinwen Song Jinping Qian the EAST Team |
| author_facet | Ruirong Liang Xianzu Gong Bin Zhang Manni Jia Hua Yang Qun Ma Youwen Sun Zhendong Yang Yunchan Hu Zuhao Wang Wei Wang Yutong Guo Jinwen Song Jinping Qian the EAST Team |
| author_sort | Ruirong Liang |
| collection | DOAJ |
| description | Controlling the splitting divertor heat flux caused by resonant magnetic perturbations (RMPs) is a topic of concern for fusion devices. As a fundamental prerequisite, it is necessary to understand the characteristics of the heat flux distribution under the applied RMP field, which will be studied in this paper. The nonlinear phenomenon of strike point splitting was found to be strongly dependent on the plasma response under RMP. These splitting heat flux distributions are qualitatively explained by the simulated magnetic footprints. The RMP phase scanning experiment shows that scanning in a certain range of relative phase can maintain good edge-localized mode (ELM) mitigation and simultaneously sweep the striations of heat flux on divertor target. Additionally, even in upper single null (USN) configurations, heat stripes are observed on the lower outer divertor (LO-div), attributed to RMP-induced additional magnetic connections to the LO-div, as confirmed by magnetic topology simulations. A dedicated investigation into the impact of the discrepancy between lower and upper separatrix radii mapped to the low field side mid-plane ( ${\text{d}}{R_{{\text{sep}}}}$ ) reveals its significant influence on both ELM control and heat flux distribution. Within a certain range of ${\text{d}}{R_{{\text{sep}}}}$ , the heat flux distribution is improved while ELM suppression is maintained. These findings contribute to divertor heat flux understanding under RMP conditions in tokamak operations. |
| format | Article |
| id | doaj-art-c88ebea55db647ef8dcee8d597363d49 |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-c88ebea55db647ef8dcee8d597363d492025-01-06T08:48:18ZengIOP PublishingNuclear Fusion0029-55152025-01-0165202602110.1088/1741-4326/ad9b38Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EASTRuirong Liang0https://orcid.org/0000-0002-1419-0234Xianzu Gong1Bin Zhang2https://orcid.org/0000-0003-0304-2372Manni Jia3https://orcid.org/0000-0002-1672-9782Hua Yang4Qun Ma5https://orcid.org/0000-0001-8057-8934Youwen Sun6https://orcid.org/0000-0002-9934-1328Zhendong Yang7Yunchan Hu8https://orcid.org/0000-0001-5791-9374Zuhao Wang9https://orcid.org/0009-0002-0343-1036Wei Wang10https://orcid.org/0009-0007-6479-6326Yutong Guo11Jinwen Song12Jinping Qian13the EAST Team14School of Physics and Telecommunication Engineering, Center for Applied Mathematics of Guangxi, Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing, Yulin Normal University , Yulin 537000, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, ChinaTongling University , Tongling 244000, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei 230026, ChinaSchool of Physics and Telecommunication Engineering, Center for Applied Mathematics of Guangxi, Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing, Yulin Normal University , Yulin 537000, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, ChinaControlling the splitting divertor heat flux caused by resonant magnetic perturbations (RMPs) is a topic of concern for fusion devices. As a fundamental prerequisite, it is necessary to understand the characteristics of the heat flux distribution under the applied RMP field, which will be studied in this paper. The nonlinear phenomenon of strike point splitting was found to be strongly dependent on the plasma response under RMP. These splitting heat flux distributions are qualitatively explained by the simulated magnetic footprints. The RMP phase scanning experiment shows that scanning in a certain range of relative phase can maintain good edge-localized mode (ELM) mitigation and simultaneously sweep the striations of heat flux on divertor target. Additionally, even in upper single null (USN) configurations, heat stripes are observed on the lower outer divertor (LO-div), attributed to RMP-induced additional magnetic connections to the LO-div, as confirmed by magnetic topology simulations. A dedicated investigation into the impact of the discrepancy between lower and upper separatrix radii mapped to the low field side mid-plane ( ${\text{d}}{R_{{\text{sep}}}}$ ) reveals its significant influence on both ELM control and heat flux distribution. Within a certain range of ${\text{d}}{R_{{\text{sep}}}}$ , the heat flux distribution is improved while ELM suppression is maintained. These findings contribute to divertor heat flux understanding under RMP conditions in tokamak operations.https://doi.org/10.1088/1741-4326/ad9b38tokamakresonant magnetic perturbation (RMP)strike point splittingdivertor heat fluxinfrared diagnostic |
| spellingShingle | Ruirong Liang Xianzu Gong Bin Zhang Manni Jia Hua Yang Qun Ma Youwen Sun Zhendong Yang Yunchan Hu Zuhao Wang Wei Wang Yutong Guo Jinwen Song Jinping Qian the EAST Team Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST Nuclear Fusion tokamak resonant magnetic perturbation (RMP) strike point splitting divertor heat flux infrared diagnostic |
| title | Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST |
| title_full | Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST |
| title_fullStr | Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST |
| title_full_unstemmed | Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST |
| title_short | Investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on EAST |
| title_sort | investigation of divertor heat flux characteristics under the influence of resonant magnetic perturbations on east |
| topic | tokamak resonant magnetic perturbation (RMP) strike point splitting divertor heat flux infrared diagnostic |
| url | https://doi.org/10.1088/1741-4326/ad9b38 |
| work_keys_str_mv | AT ruirongliang investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT xianzugong investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT binzhang investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT mannijia investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT huayang investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT qunma investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT youwensun investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT zhendongyang investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT yunchanhu investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT zuhaowang investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT weiwang investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT yutongguo investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT jinwensong investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT jinpingqian investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast AT theeastteam investigationofdivertorheatfluxcharacteristicsundertheinfluenceofresonantmagneticperturbationsoneast |