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Title: 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}
}