Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EAST
This paper validates for the first time the predictive capability of the DYON code for plasma initiation in EAST, which has metallic wall, superconducting coils and conventional tokamak shape, like ITER. The model accurately reproduced the operating spaces of loop voltage and prefill gas pressure fo...
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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/ade457 |
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| author | Runze Chen Hyun-Tae Kim Wenbin Liu Jinping Qian Bin Zhang Ximan Li Zhengping Luo Dalong Chen Yaowei Yu Wei Gao Guizhong Zuo Tianqi Jia Pan Li Zhongfang Guan Wenyi Lu Yutong Guo Cong Cao Zuhao Wang Yifan He Wei Wang Yunchan Hu Xianzu Gong |
| author_facet | Runze Chen Hyun-Tae Kim Wenbin Liu Jinping Qian Bin Zhang Ximan Li Zhengping Luo Dalong Chen Yaowei Yu Wei Gao Guizhong Zuo Tianqi Jia Pan Li Zhongfang Guan Wenyi Lu Yutong Guo Cong Cao Zuhao Wang Yifan He Wei Wang Yunchan Hu Xianzu Gong |
| author_sort | Runze Chen |
| collection | DOAJ |
| description | This paper validates for the first time the predictive capability of the DYON code for plasma initiation in EAST, which has metallic wall, superconducting coils and conventional tokamak shape, like ITER. The model accurately reproduced the operating spaces of loop voltage and prefill gas pressure for ohmic discharges, demonstrating its validity in predicting the required operating parameters for successful inductive plasma initiation in EAST. The role of wall conditioning on plasma initiation was investigated with the newly developed physical sputtering models of Boron and Lithium. In EAST experiments, it was observed that the discharges after boronisation of the wall are much more vulnerable to plasma burn-through failure than after lithium-coating. The simulation results revealed that despite the similar physical sputtering yield in Boron and Lithium, the radiative energy loss rates for the boron-coated wall are significantly higher than those for the lithium-coated wall, due to the much higher radiative power coefficients of Boron. Parametric scans of initial Boron content in ohmic discharge at the typical prefilled gas pressure in EAST (0.8 mPa) showed that even 1.5% of Boron content in the prefilled gas, possibly remaining after boronisation of the wall, could lead to excessive radiation energy losses and failure of plasma burn-through. For successful plasma burn-through with 1.5% initial boron content, the modelling indicates 10 kW absorption of EC power is required, and it increases with more initial boron e.g. 50 kW for 3% initial boron content. |
| format | Article |
| id | doaj-art-ce03418d9f0c4e5b8ec3d0751e0dec9c |
| institution | OA Journals |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-ce03418d9f0c4e5b8ec3d0751e0dec9c2025-08-20T02:35:29ZengIOP PublishingNuclear Fusion0029-55152025-01-0165707604310.1088/1741-4326/ade457Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EASTRunze Chen0https://orcid.org/0009-0004-4391-650XHyun-Tae Kim1https://orcid.org/0009-0008-2549-5624Wenbin Liu2https://orcid.org/0000-0003-1042-4117Jinping Qian3https://orcid.org/0000-0002-2646-6509Bin Zhang4https://orcid.org/0000-0003-0304-2372Ximan Li5https://orcid.org/0009-0008-2282-4875Zhengping Luo6https://orcid.org/0000-0002-9560-6720Dalong Chen7https://orcid.org/0000-0001-7093-3154Yaowei Yu8https://orcid.org/0000-0003-2319-7259Wei Gao9Guizhong Zuo10https://orcid.org/0000-0002-4149-089XTianqi Jia11https://orcid.org/0000-0001-9797-6904Pan Li12https://orcid.org/0009-0006-7304-2721Zhongfang Guan13https://orcid.org/0009-0006-2232-7241Wenyi Lu14Yutong Guo15Cong Cao16Zuhao Wang17https://orcid.org/0009-0002-0343-1036Yifan He18Wei Wang19https://orcid.org/0009-0007-6479-6326Yunchan Hu20https://orcid.org/0000-0001-5791-9374Xianzu Gong21Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaUnited Kingdom Atomic Energy Authority , Abingdon, United Kingdom of Great Britain and Northern IrelandInstitute 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, ChinaDepartment of Engineering Physics, Tsinghua University , Beijing 100084, 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, 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, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, China; University of Science and Technology of China , Hefei, Anhui, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei 230031, ChinaThis paper validates for the first time the predictive capability of the DYON code for plasma initiation in EAST, which has metallic wall, superconducting coils and conventional tokamak shape, like ITER. The model accurately reproduced the operating spaces of loop voltage and prefill gas pressure for ohmic discharges, demonstrating its validity in predicting the required operating parameters for successful inductive plasma initiation in EAST. The role of wall conditioning on plasma initiation was investigated with the newly developed physical sputtering models of Boron and Lithium. In EAST experiments, it was observed that the discharges after boronisation of the wall are much more vulnerable to plasma burn-through failure than after lithium-coating. The simulation results revealed that despite the similar physical sputtering yield in Boron and Lithium, the radiative energy loss rates for the boron-coated wall are significantly higher than those for the lithium-coated wall, due to the much higher radiative power coefficients of Boron. Parametric scans of initial Boron content in ohmic discharge at the typical prefilled gas pressure in EAST (0.8 mPa) showed that even 1.5% of Boron content in the prefilled gas, possibly remaining after boronisation of the wall, could lead to excessive radiation energy losses and failure of plasma burn-through. For successful plasma burn-through with 1.5% initial boron content, the modelling indicates 10 kW absorption of EC power is required, and it increases with more initial boron e.g. 50 kW for 3% initial boron content.https://doi.org/10.1088/1741-4326/ade457start-upDYONburn-throughEASTphysical sputtering model |
| spellingShingle | Runze Chen Hyun-Tae Kim Wenbin Liu Jinping Qian Bin Zhang Ximan Li Zhengping Luo Dalong Chen Yaowei Yu Wei Gao Guizhong Zuo Tianqi Jia Pan Li Zhongfang Guan Wenyi Lu Yutong Guo Cong Cao Zuhao Wang Yifan He Wei Wang Yunchan Hu Xianzu Gong Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EAST Nuclear Fusion start-up DYON burn-through EAST physical sputtering model |
| title | Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EAST |
| title_full | Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EAST |
| title_fullStr | Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EAST |
| title_full_unstemmed | Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EAST |
| title_short | Validation of DYON simulations and development of physical sputtering models for lithiation and boronisation in EAST |
| title_sort | validation of dyon simulations and development of physical sputtering models for lithiation and boronisation in east |
| topic | start-up DYON burn-through EAST physical sputtering model |
| url | https://doi.org/10.1088/1741-4326/ade457 |
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