Development of a hybrid kinetic-fluid model for line radiation transport in magnetic fusion plasmas
Development of a hybrid kinetic-fluid model for line radiation transport in magnetic fusion plasmas
We report on a transport model for the Lyman line radiation in optically thick divertor plasma conditions encountered in exhaust systems in magnetic fusion devices. The model is designed to switch automatically between a kinetic and a continuum description according to the plasma conditions and to t...
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Personal Name(s): | Rosato, J. (Corresponding author) |
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Marandet, Y. / Reiter, D. / Stamm, R. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | High energy density physics, 22 (2017) S. 73 - 76 |
Imprint: |
Amsterdam [u.a.]
Elsevier
2017
|
DOI: |
10.1016/j.hedp.2017.02.012 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Publikationsportal JuSER |
We report on a transport model for the Lyman line radiation in optically thick divertor plasma conditions encountered in exhaust systems in magnetic fusion devices. The model is designed to switch automatically between a kinetic and a continuum description according to the plasma conditions and to the spectral range. A kinetic treatment is retained for photons with a large mean free path (line wings), whereas a continuum description of the radiation field is invoked in highly absorbing or scattering regions (core photons). Prototypical calculations of this so-called δf Monte Carlo type of the Lyman α photo-excitation rate in slab geometry are performed as an illustration. The hybrid method is suggested as a candidate for speeding up the kinetic transport codes currently involved in magnetic fusion research for ITER and DEMO divertor (power and particle exhaust system) design. |