dorsal/arxiv
View SchemaStudies of Plasma Detachment Using a One Dimensional Model for Divertor Operation
| Authors | R. A. Vesey, D. E. Post, G. Bateman |
|---|---|
| Categories | |
| ArXiv ID | plasm-ph/9507001 |
| URL | https://arxiv.org/abs/plasm-ph/9507001 |
| DOI | 10.1016/0022-3115(94)00465-X |
Abstract
To characterize the conditions required to reach advanced divertor regimes, a one-dimensional computational model has been developed based on a coordinate transformation to incorporate two-dimensional effects. This model includes transport of ions, two species each of atoms and molecules, momentum, and ion and electron energy both within and across the flux surfaces. Impurity radiation is calculated using a coronal equilibrium model which includes the effects of charge-exchange recombination. Numerical results indicate that impurity radiation acts to facilitate plasma detachment and enhances the power lost from the divertor channel in escaping neutral atoms by cooling the electrons and suppressing ionization. As divertor particle densities increase, cold and thermal molecules become increasingly important in cooling the plasma, with molecular densities dominating electron and atomic densities under some conditions.
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"abstract": "To characterize the conditions required to reach advanced divertor regimes, a\none-dimensional computational model has been developed based on a coordinate\ntransformation to incorporate two-dimensional effects. This model includes\ntransport of ions, two species each of atoms and molecules, momentum, and ion\nand electron energy both within and across the flux surfaces. Impurity\nradiation is calculated using a coronal equilibrium model which includes the\neffects of charge-exchange recombination. Numerical results indicate that\nimpurity radiation acts to facilitate plasma detachment and enhances the power\nlost from the divertor channel in escaping neutral atoms by cooling the\nelectrons and suppressing ionization. As divertor particle densities increase,\ncold and thermal molecules become increasingly important in cooling the plasma,\nwith molecular densities dominating electron and atomic densities under some\nconditions.",
"arxiv_id": "plasm-ph/9507001",
"authors": [
"R. A. Vesey",
"D. E. Post",
"G. Bateman"
],
"categories": [
"plasm-ph",
"physics.plasm-ph"
],
"doi": "10.1016/0022-3115(94)00465-X",
"title": "Studies of Plasma Detachment Using a One Dimensional Model for Divertor Operation",
"url": "https://arxiv.org/abs/plasm-ph/9507001"
},
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