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Calculation and prediction of divertor detachment via impurity seeding by using one-dimensional model

Chinese Physics B 2024年第8期33卷 370-379页

作者：周文杰刘晓菊邬潇河李邦石奇奇樊皓尘杨艳杰李国强 Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China

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 *** 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 *** 58045013(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 *** 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 *** 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 *** on the predictions,the optimized parameter space for divertor detachment operation on EAST and CFETR is also *** 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.

关键词： divertor detachment impurity seeding one-dimensional modeling

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Kinetic equilibrium reconstruction with internal safety factor profile constraints on EAST tokamak

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Plasma Science and Technology 2024年第4期26卷 61-67页

作者：樊皓尘李国强钱金平张学习邬潇河储宇奇朱翔连辉刘海庆吕波金仡飞臧庆黄佳 Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230031People’s Republic of China Shenzhen University Shenzhen 518060People’s Republic of China University of California Los Angeles Los Angeles 90095United States of America

Reconstruction of plasma equilibrium plays an important role in the analysis and simulation of plasma experiments. The kinetic equilibrium reconstruction with pressure and edge current constraints has been employed on EAST tokamak. However, the internal safety factor(q) profile is not accurate. This paper proposes a new way of incorporating q profile constraints into kinetic equilibrium reconstruction. The q profile is yielded from the Polarimeter Interferometer(POINT)reconstruction. Virtual probes containing information on q profile constraints are added to inputs of the kinetic equilibrium reconstruction program to obtain the final equilibrium. The new equilibrium produces a more accurate internal q profile. This improved method would help analyze EAST experiments.

关键词： equilibrium reconstruction tokamak data analysis kinetic equilibrium q profile polarimeter-interferometer

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Simulation studies of tungsten impurity behaviors during neon impurity seeding with tungsten bundled charge state model using SOLPS-ITER on EAST

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Plasma Science and Technology 2022年第7期24卷 137-147页

作者： Shanlu GAO Xiaoju LIU Guozhong DENG Tingfeng MING Guoqiang LI Xuexi ZHANG Xiaodong WU Xiaohe WU Bang LI Haochen FAN Xiang GAO Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China Advanced Energy Research Center Shenzhen UniversityShenzhen 518060People's Republic of China

An investigation into tungsten(W)impurity behaviors with the update of the EAST lower W divertor for H-mode has been carried out using *** work aims to study the effect of external neon(Ne)impurity seeding on W impurity sputtering with the bundled charge state *** the Ne seeding rate increases,plasma parameters,W concentration(C_(W)),and eroded W flux(Γ_(W)^(Ero))at both targets are compared and analyzed between the highly resolved bundled model‘jett’and the full W charge state *** results indicate that‘jett’can produce divertor behaviors essentially in agreement with the full W charge state *** bundled scheme with high resolution in low W charge states(

关键词： tungsten impurity sputtering bundled charge state model transport diffusivity SOLPS-ITER

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