A comparison of SOLPS-ITER and Gkeyll simulations on LTX
POSTER
Abstract
Simulations using the gyrokinetic edge code Gkeyll of a hydrogen plasma with lithium impurity
are compared to simulations using the fluid SOLPS-ITER code with drifts on. An analysis is made
of the difference between Gkeyll and SOLPS-ITER in both the collisional and long mean free path
regimes, examining the differences between a kinetic and fluid model. The effect of the flux
limiters in SOLPS-ITER is examined in the comparison to the kinetic code. As a low aspect ratio
tokamak has larger trapped particle fractions, the effect of these is also examined. These initial
investigations will be followed by future double-null simulations for a spherical tokamak.
are compared to simulations using the fluid SOLPS-ITER code with drifts on. An analysis is made
of the difference between Gkeyll and SOLPS-ITER in both the collisional and long mean free path
regimes, examining the differences between a kinetic and fluid model. The effect of the flux
limiters in SOLPS-ITER is examined in the comparison to the kinetic code. As a low aspect ratio
tokamak has larger trapped particle fractions, the effect of these is also examined. These initial
investigations will be followed by future double-null simulations for a spherical tokamak.
Presenters
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Jonathan Roeltgen
University of Texas at Austin
Authors
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Jonathan Roeltgen
University of Texas at Austin
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A. Shukla
The University of Texas at Austin, University of Texas
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Tess Bernard
General Atomics - San Diego
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Michael T Kotschenreuther
ExoFusion, The University of Texas at Austin, UT-Austin, University of Texas at Austin, Institute for fusion studies
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D.R. R Hatch
Institute for Fusion Studies, University of Texas at Austin, UT-Austin, University of Texas