Simulation of Diffusive Lithium Evaporation Onto the NSTX Vessel Walls
Abstract
A model for simulating the diffusive evaporation of lithium into a helium filled NSTX vacuum vessel is described and validated against an initial set of deposition experiments. The DEGAS 2 based model consists of a three-dimensional representation of the vacuum vessel, the elastic scattering process, and a kinetic description of the evaporated atoms. Additional assumptions are required to account for deuterium out-gassing during the validation experiments. The model agrees with the data over a range of pressures to within the estimated uncertainties. Suggestions are made for more discriminating experiments that will lead to an improved model.
- Authors:
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1001673
- Report Number(s):
- PPPL-4582
TRN: US1101044
- DOE Contract Number:
- DE-ACO2-09CH11466
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ATOMS; DEPOSITION; DEUTERIUM; ELASTIC SCATTERING; EVAPORATION; HELIUM; KINETICS; LITHIUM; SIMULATION; VALIDATION; Computer Simulation, Tokamak, NSTX
Citation Formats
Stotler, D. P., Skinner, C. H., Blanchard, W. R., Krstic, P. S., Kugel, H. W., Schneider, H., and Zakharov, L. E. Simulation of Diffusive Lithium Evaporation Onto the NSTX Vessel Walls. United States: N. p., 2010.
Web. doi:10.2172/1001673.
Stotler, D. P., Skinner, C. H., Blanchard, W. R., Krstic, P. S., Kugel, H. W., Schneider, H., & Zakharov, L. E. Simulation of Diffusive Lithium Evaporation Onto the NSTX Vessel Walls. United States. https://doi.org/10.2172/1001673
Stotler, D. P., Skinner, C. H., Blanchard, W. R., Krstic, P. S., Kugel, H. W., Schneider, H., and Zakharov, L. E. 2010.
"Simulation of Diffusive Lithium Evaporation Onto the NSTX Vessel Walls". United States. https://doi.org/10.2172/1001673. https://www.osti.gov/servlets/purl/1001673.
@article{osti_1001673,
title = {Simulation of Diffusive Lithium Evaporation Onto the NSTX Vessel Walls},
author = {Stotler, D. P. and Skinner, C. H. and Blanchard, W. R. and Krstic, P. S. and Kugel, H. W. and Schneider, H. and Zakharov, L. E.},
abstractNote = {A model for simulating the diffusive evaporation of lithium into a helium filled NSTX vacuum vessel is described and validated against an initial set of deposition experiments. The DEGAS 2 based model consists of a three-dimensional representation of the vacuum vessel, the elastic scattering process, and a kinetic description of the evaporated atoms. Additional assumptions are required to account for deuterium out-gassing during the validation experiments. The model agrees with the data over a range of pressures to within the estimated uncertainties. Suggestions are made for more discriminating experiments that will lead to an improved model.},
doi = {10.2172/1001673},
url = {https://www.osti.gov/biblio/1001673},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 09 00:00:00 EST 2010},
month = {Thu Dec 09 00:00:00 EST 2010}
}
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