Molecular dynamics modeling of deuterium in liquid lithium surfaces

Qiu, Hua Tan; Ruzic, D. N.

doi:10.1016/j.jnucmat.2004.10.020

Cited by 2 publications

(1 citation statement)

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“…The liquid Li surface model used in TRIM-SP assumes a temperature-dependent binding energy for surface atoms developed on the basis of atomistic simulations of lithium self-bombardment and D + bombardment as a function of temperature [10,11]. Figure 2 shows the result of temperature-dependent Li particle emission based on the semiempirical temperature-dependent models referenced above.…”

Section: Temperature-dependent Sputtering Of D-containing Lithiummentioning

confidence: 99%

Lithium surface-response modelling for the NSTX liquid lithium divertor

Allain¹,

Brooks²

2011

Nucl. Fusion

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We analyse lithium sputtering, evaporation and transport for the National Spherical Torus Experiment (NSTX) liquid lithium divertor (LLD) for planned high heating power plasma conditions. A temperature-dependent, data-calibrated, surface-response model is used to specify sputter yield, velocity distributions, sputtered Li ion fraction and related phenomena, for the static liquid lithium surface with D, Li and trace C impingement. Using the surface-response model, and supplied UEDGE code edge plasma parameters and LLD surface temperature profile for a typical 2 MW heating, low D-recycle shot, the REDEP/WBC code package computes Li erosion/redeposition. The results are encouraging showing negligible Li evaporation, moderate sputter erosion, and acceptable Li transport to the edge (∼7% Li/D density) and core plasma (∼1% Li/D contamination potential) and LLD adjacent surfaces. A 2% carbon plasma content does not significantly affect the LLD surface response. For fixed plasma conditions, but with hypothetically higher surface temperatures than the reference 281 °C peak, an increase to ∼350 °C appears acceptable, thus implying a significant operating temperature margin.

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Section: Temperature-dependent Sputtering Of D-containing Lithiummentioning

confidence: 99%