| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Calculation and prediction of divertor detachment via impurity seeding by using one-dimensional model |
| Wen-Jie Zhou(周文杰)1,2, Xiao-Ju Liu(刘晓菊)1,†, Xiao-He Wu(邬潇河)1,2, Bang Li(李邦)1,2, Qi-Qi Shi(石奇奇)1,2, Hao-Chen Fan(樊皓尘)1,2, Yan-Jie Yang(杨艳杰)1,2, and Guo-Qiang Li(李国强)1,‡ |
1 Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
2 University of Science and Technology of China, Hefei 230026, China |
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Abstract Achieving the detachment of divertor can help to alleviate excessive heat load and sputtering problems on the target plates, thereby extending the lifetime of divertor components for fusion devices. In order to provide a fast but relatively reliable prediction of plasma parameters along the flux tube for future device design, a one-dimensional (1D) modeling code for the operating point of impurity seeded detached divertor is developed based on Python language, which is a fluid model based on previous work (Plasma Phys. Control. Fusion 58 045013 (2016)). The experimental observation of the onset of divertor detachment by neon (Ne) and argon (Ar) seeding in EAST is well reproduced by using the 1D modeling code. The comparison between the 1D modeling and two-dimensional (2D) simulation by the SOLPS-ITER code for CFETR detachment operation with Ne and Ar seeding also shows that they are in good agreement. We also predict the radiative power loss and corresponding impurity concentration requirement for achieving divertor detachment via different impurity seeding under high heating power conditions in EAST and CFETR phase II by using the 1D model. Based on the predictions, the optimized parameter space for divertor detachment operation on EAST and CFETR is also determined. Such a simple but reliable 1D model can provide a reasonable parameter input for a detailed and accurate analysis by 2D or three-dimensional (3D) modeling tools through rapid parameter scanning.
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Received: 25 January 2024
Revised: 16 April 2024
Accepted manuscript online:
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PACS:
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52.55.Rk
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(Power exhaust; divertors)
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52.65.-y
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(Plasma simulation)
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52.55.Fa
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(Tokamaks, spherical tokamaks)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2022YFE03030001) and the National Natural Science Foundation of China (Grant No. 12075283). |
Corresponding Authors:
Xiao-Ju Liu, Guo-Qiang Li
E-mail: julie1982@ipp.ac.cn;ligq@ipp.ac.cn
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Cite this article:
Wen-Jie Zhou(周文杰), Xiao-Ju Liu(刘晓菊), Xiao-He Wu(邬潇河), Bang Li(李邦), Qi-Qi Shi(石奇奇), Hao-Chen Fan(樊皓尘), Yan-Jie Yang(杨艳杰), and Guo-Qiang Li(李国强) Calculation and prediction of divertor detachment via impurity seeding by using one-dimensional model 2024 Chin. Phys. B 33 085205
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