This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1088/1742-6596/490/1/012210 in citations.
Please use the identifier: http://hdl.handle.net/2128/11486 in citations.
'Shell' approach to modeling of impurity spreading from localized sources in plasma
'Shell' approach to modeling of impurity spreading from localized sources in plasma
In fusion devices strongly localized intensive sources of impurities may arise unexpectedly or can be created deliberately through impurity injection. The spreading of impurities from such sources is essentially three-dimensional and non-stationary phenomenon involving physical processes of extremel...
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Personal Name(s): | Tokar, Mikhail (Corresponding Author) |
---|---|
Koltunov, Mikhail | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Journal of physics / Conference Series, 490 (2014) S. 012210 - |
Imprint: |
Bristol
IOP Publ.
2014
|
DOI: |
10.1088/1742-6596/490/1/012210 |
Document Type: |
Journal Article |
Research Program: |
Plasma theory |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/11486 in citations.
In fusion devices strongly localized intensive sources of impurities may arise unexpectedly or can be created deliberately through impurity injection. The spreading of impurities from such sources is essentially three-dimensional and non-stationary phenomenon involving physical processes of extremely different time scales. Numerical modeling of such events is still a very challenging task even by using most modern computers. To diminish drastically the calculation time a "shell" model has been elaborated that allows to reduce equations for particle, parallel momentum and energy balances of various ion species to one-dimensional equations describing the time evolution of radial profiles for several most characteristic parameters. The assumptions of the "shell" approach are verified by comparing its predictions with a numerical solution of one-dimensional time dependent diffusion equation. |