Modeling of aluminum impurity entrainment in the PISCES-A He+ plasma

A 1D theoretical model describing transport of Al impurities in a low temperature He+ plasma is discussed. The model adopts a kinetic approach to describe impurity entrainment in a steady state He+ plasma flow. Results of a 1D Monte Carlo simulation supporting this model are presented and compared t...

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Bibliographic Details
Published in:Journal of nuclear materials 2015-08, Vol.463 (C), p.664-667
Main Authors: Hajjar, R.J., Hollmann, E.M., Krasheninnikov, S.I., Doerner, R.P.
Format: Article
Language:English
Subjects:
Aluminum
Computer simulation
Density
Entrainment
Impurities
Mathematical models
Nuclear engineering
Steady state
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Summary:A 1D theoretical model describing transport of Al impurities in a low temperature He+ plasma is discussed. The model adopts a kinetic approach to describe impurity entrainment in a steady state He+ plasma flow. Results of a 1D Monte Carlo simulation supporting this model are presented and compared to experimental data collected from PISCES-A linear experiment. Both simulation and experimental results confirm that impurities are quickly entrained by the background plasma and quickly acquire its flowing velocity. However, a major discrepancy is observed in the temporal width when comparing the simulation to the experimental Al2+ density profiles downstream the flow. Consideration of several potential effects suggests that background plasma velocity shear is the most likely cause for this discrepancy.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2014.11.040