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Simulation of gross and net erosion of high-Z materials in the DIII-D divertor

文献类型：期刊论文

作者Ding, R.1,2,3; Stangeby, P. C.4; Rudakov, D. L.5; Elder, J. D.4; Tskhakaya, D.6,7; Wampler, W. R.8; Kirschner, A.9; McLean, A. G.10; Guo, H. Y.1,2; Chan, V. S.1
刊名NUCLEAR FUSION
出版日期2016
卷号56期号:1页码:016021
关键词Erosion Redeposition High-z Material
DOI10.1088/0029-5515/56/1/016021
文献子类Article
英文摘要The three-dimensional Monte Carlo code ERO has been used to simulate dedicated DIII-D experiments in which Mo and W samples with different sizes were exposed to controlled and well-diagnosed divertor plasma conditions to measure the gross and net erosion rates. Experimentally, the net erosion rate is significantly reduced due to the high local redeposition probability of eroded high-Z materials, which according to the modelling is mainly controlled by the electric field and plasma density within the Chodura sheath. Similar redeposition ratios were obtained from ERO modelling with three different sheath models for small angles between the magnetic field and the material surface, mainly because of their similar mean ionization lengths. The modelled redeposition ratios are close to the measured value. Decreasing the potential drop across the sheath can suppress both gross and net erosion because sputtering yield is decreased due to lower incident energy while the redeposition ratio is not reduced owing to the higher electron density in the Chodura sheath. Taking into account material mixing in the ERO surface model, the net erosion rate of high-Z materials is shown to be strongly dependent on the carbon impurity concentration in the background plasma; higher carbon concentration can suppress net erosion. The principal experimental results such as net erosion rate and profile and redeposition ratio are well reproduced by the ERO simulations.
WOS关键词PLASMA-WALL TRANSITION ; MAGNETIC-FIELD ; TUNGSTEN ; CODE ; MOLYBDENUM ; TRANSPORT ; DEVICES ; CARBON ; ITER
WOS研究方向Physics
语种英语
WOS记录号WOS:000367934400026
资助机构US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy Office of Advanced Scientific Computing Research(DE-FC02-04ER54698 ; US Department of Energy's National Nuclear Security Administration(DE-AC04-94AL85000) ; US Department of Energy's National Nuclear Security Administration(DE-AC04-94AL85000) ; US Department of Energy's National Nuclear Security Administration(DE-AC04-94AL85000) ; US Department of Energy's National Nuclear Security Administration(DE-AC04-94AL85000) ; 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National Magnetic Confinement Fusion Science Program of China(2013GB107004) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; National Natural Science Foundation of China(11375010) ; Sino-German Center for Research Promotion(GZ769) ; 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源URL[http://ir.hfcas.ac.cn:8080/handle/334002/21923]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.Gen Atom Co, San Diego, CA 92186 USA
2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
3.Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA
4.Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada
5.Univ Calif San Diego, La Jolla, CA 92093 USA
6.TU Wien, Inst Appl Phys, Fus OAW, A-1040 Vienna, Austria
7.Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria
8.Sandia Natl Labs, Albuquerque, NM 87185 USA
9.Forschungszentrum Julich, Inst Energy & Climate Res Plasma Phys, D-52425 Julich, Germany
10.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
推荐引用方式
GB/T 7714		 Ding, R.,Stangeby, P. C.,Rudakov, D. L.,et al. Simulation of gross and net erosion of high-Z materials in the DIII-D divertor[J]. NUCLEAR FUSION,2016,56(1):016021.
APA Ding, R..,Stangeby, P. C..,Rudakov, D. L..,Elder, J. D..,Tskhakaya, D..,...&Snyder, P. B..(2016).Simulation of gross and net erosion of high-Z materials in the DIII-D divertor.NUCLEAR FUSION,56(1),016021.
MLA Ding, R.,et al."Simulation of gross and net erosion of high-Z materials in the DIII-D divertor".NUCLEAR FUSION 56.1(2016):016021.

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来源：合肥物质科学研究院

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