Modelling of nanometer scale dust grains in tokamak
文献类型：期刊论文
| 作者 | Liu, Zhuang1,2; Xiao, Xiaotao1,3 ; Xu, Xueqiao1; Li, Nami2; Tang, Tengfei2; Wang, Dezhen2
|
| 刊名 | CONTRIBUTIONS TO PLASMA PHYSICS
 |
| 出版日期 | 2020-06-01 |
| 卷号 | 60 |
| 关键词 | BOUT plus plus Nanodust plasma simulation tokamak |
| ISSN号 | 0863-1042 |
| DOI | 10.1002/ctpp.201900136 |
| 通讯作者 | Wang, Dezhen(wangdez@dlut.edu.cn) |
| 英文摘要 | Dust poses a serious threat to tokamak operation and safety. It is important to study the behaviour of dust grains under tokamak's discharge conditions, which depends heavily on their size and charge. Existing simulations mainly address issues on dust grains with radii larger than 1 mu m, in which case, the drift effect due to electromagnetic fields can be safely ignored. For nanometer scale dust grains, however, the drift effect becomes significant and a new model based on guiding-centre system needs to be established. In this work, the NDS has been done under BOUT++ framework. The simulation contains two parts. Part one, NDS evaluates the charging and ablation processes of the dust grains. In the second part, the guiding-centre orbits of dust particles are tracked in tokamak plasmas, whose parameters are obtained from BOUT++, a highly desirable C++ code package for performing parallel plasma fluid simulations with an arbitrary number of equations in 3D curvilinear coordinates. The orbit of nanodust dynamics is described by guiding centre equations for simplicity, and these equations are numerically solved by conventional fourth-order Runge Kutta method. Simulations provide results such as trajectories and evolutions of dust particles with different sizes and velocities for different tokamak geometries. Results show tungsten dust grains with a radius of a few nanometers launched from outer midplane will oscillate before totally ablated in C-Mod. The oscillation in this case is driven by the ion drag force. Larger Nanodust with a radius of 100 nm, on the contrary, cannot be completely constrained by the electromagnetic field. The high plasma temperature and density in the seperatrix region causes severe dust ablation, resulting in total ablation within several ms. |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000556597900018 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/45076]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Wang, Dezhen |
| 作者单位 | 1.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA 2.Dalian Univ Technol, Phys Dept, Dalian 116024, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zhuang,Xiao, Xiaotao,Xu, Xueqiao,et al. Modelling of nanometer scale dust grains in tokamak[J]. CONTRIBUTIONS TO PLASMA PHYSICS,2020,60. |
| APA | Liu, Zhuang,Xiao, Xiaotao,Xu, Xueqiao,Li, Nami,Tang, Tengfei,&Wang, Dezhen.(2020).Modelling of nanometer scale dust grains in tokamak.CONTRIBUTIONS TO PLASMA PHYSICS,60. |
| MLA | Liu, Zhuang,et al."Modelling of nanometer scale dust grains in tokamak".CONTRIBUTIONS TO PLASMA PHYSICS 60(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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