Simulations of NSTX with a Liquid Lithium Divertor Module
Authors: D. P. Stotler, R. Maingi, H.W. Kugel, A. Yu. Pigarov, T.D. Rognlien, V.A. Soukhanovskii
Abstract:
The UEDGE edge plasma transport code is used to model the effect of the reduced recycling provided by the Liquid Lithium Divertor (LLD) module that will be installed in NSTX. UEDGE's transport coefficients are calibrated against an existing NSTX shot using midplane and divertor diagnostic data. The LLD is then incorporated into the simulations as a reduction in the recycling coefficient over the outer divertor. Heat transfer calculations performed using the resulting heat flux profiles indicate that lithium evaporation will be negligible for pulse lengths < 2 s at low (∼ 2 MW) input power. At high input power (∼ 7 MW), the pulse length may have to be restricted.
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Presented at: 18th International Conference of Plasma Surface Interactions, Toledo, Spain May 26-30, 2008
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Download PPPL-4331 (pdf 1.55MB 14pp)
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