Multi‐level model of radiation transport in inhomogeneous plasma

Radiation transport in plasma can be important for a number of problems, for example, first wall‐shielding effects or influence of hydrogen isotope radiation on tokamak edge plasma. Existing calculations in the field employ many simplifying assumptions. For example, the model of radiation transport...

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Bibliographic Details
Published in:Contributions to plasma physics (1988) 2018-07, Vol.58 (6-8), p.570-577
Main Authors: Marenkov, E., Krasheninnikov, S., Pshenov, A.
Format: Article
Language:English
Subjects:
divertor
Doppler
Ground level
Hydrogen isotopes
line broadening
Line shape
Nonuniform plasmas
Photoexcitation
Plasma
Plasma radiation
Plasma temperature
Radiation
Radiation shielding
Radiation transport
Shape effects
Stark
Stark effect
tokamak
Tokamak devices
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Summary:Radiation transport in plasma can be important for a number of problems, for example, first wall‐shielding effects or influence of hydrogen isotope radiation on tokamak edge plasma. Existing calculations in the field employ many simplifying assumptions. For example, the model of radiation transport in one of the most used codes, SOLPS, suggests that photoexcitation can be ignored for all transitions, not including the ground level. We develop a collisional radiative model of radiation transport in a multi‐level system, fully accounting for all transitions between levels. The role of the Stark effect in line shape is taken into account. The validity of some of the approximations made in SOLPS is analysed for detached divertor plasma in DIII‐D‐like tokamak geometry. It is shown that total radiation flux is directed away from the divertor target due to nonuniform plasma temperature and density.
ISSN:0863-1042
1521-3986
DOI:10.1002/ctpp.201700132