Enhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinch
In this work, we use the three-dimensional resistive MHD code NIMROD to investigate the impact of resistivity inhomogeneity on the sawtooth process of a cylindrical reversed field pinch (RFP) plasma. The simulation employs a non-uniform resistivity profile similar to experiments, which monotonically...
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| Format: | Article |
| Language: | English |
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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/adf75e |
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| author | Wentan Yan Ping Zhu Hong Li Wandong Liu Bing Luo Haolong Li |
| author_facet | Wentan Yan Ping Zhu Hong Li Wandong Liu Bing Luo Haolong Li |
| author_sort | Wentan Yan |
| collection | DOAJ |
| description | In this work, we use the three-dimensional resistive MHD code NIMROD to investigate the impact of resistivity inhomogeneity on the sawtooth process of a cylindrical reversed field pinch (RFP) plasma. The simulation employs a non-uniform resistivity profile similar to experiments, which monotonically increases from the core to the edge as the temperature decreases. The resistivity inhomogeneity introduces an additional electric field in the plasma, which accelerates the inward diffusion of magnetic flux and changing the self sustained reversal state, hence significantly enhances the dynamo effect and the sawtooth process in the RFP plasma. |
| format | Article |
| id | doaj-art-c3674ada0ac34bbaab1cfb39ff0d22c8 |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-c3674ada0ac34bbaab1cfb39ff0d22c82025-08-20T03:41:19ZengIOP PublishingNuclear Fusion0029-55152025-01-0165909601310.1088/1741-4326/adf75eEnhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinchWentan Yan0Ping Zhu1https://orcid.org/0000-0002-5773-8861Hong Li2Wandong Liu3Bing Luo4Haolong Li5KTX Laboratory and Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China , Hefei, Anhui 230026, ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology, International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology , Wuhan, Hubei 430074, China; Department of Nuclear Engineering and Engineering Physics, University of Wisconsin-Madison , Madison, WI 53706, United States of AmericaKTX Laboratory and Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China , Hefei, Anhui 230026, ChinaKTX Laboratory and Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China , Hefei, Anhui 230026, ChinaHunan Province Key Laboratory Integration and Optical Manufacturing Technology, College of Mathematics and Physics, Hunan University of Arts and Science , Changde, Hunan 415000, ChinaDepartment of Physics, School of Science, Tianjin University of Science and Technology , Tianjin 300457, ChinaIn this work, we use the three-dimensional resistive MHD code NIMROD to investigate the impact of resistivity inhomogeneity on the sawtooth process of a cylindrical reversed field pinch (RFP) plasma. The simulation employs a non-uniform resistivity profile similar to experiments, which monotonically increases from the core to the edge as the temperature decreases. The resistivity inhomogeneity introduces an additional electric field in the plasma, which accelerates the inward diffusion of magnetic flux and changing the self sustained reversal state, hence significantly enhances the dynamo effect and the sawtooth process in the RFP plasma.https://doi.org/10.1088/1741-4326/adf75eRFPdynamo effectsawtooth crashMHD simulation |
| spellingShingle | Wentan Yan Ping Zhu Hong Li Wandong Liu Bing Luo Haolong Li Enhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinch Nuclear Fusion RFP dynamo effect sawtooth crash MHD simulation |
| title | Enhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinch |
| title_full | Enhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinch |
| title_fullStr | Enhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinch |
| title_full_unstemmed | Enhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinch |
| title_short | Enhanced dynamo drive for the sawtooth relaxation process due to non-uniform resistivity distribution in a reversed field pinch |
| title_sort | enhanced dynamo drive for the sawtooth relaxation process due to non uniform resistivity distribution in a reversed field pinch |
| topic | RFP dynamo effect sawtooth crash MHD simulation |
| url | https://doi.org/10.1088/1741-4326/adf75e |
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