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EUROfusion

Abstract of KIPP2D Project

KInetic code for Plasma Periphery (KIPP), developed at IPP/Garching, was created as a tool to study kinetic effects of parallel plasma transport in the scrape-off layer and divertor. Experience gained from the code's simulation results should form a scientific basis for implementation of kinetic effects (such as heat flux limiters/enhancements) in present day 2D fluid codes, such as SOLPS. Test runs of KIPP demonstrated the code's stability and extreme accuracy. Benchmarks carried out in the limit of strong collisionality demonstrated good match to analytical expressions with accuracy within 1% for most important transport coefficients: plasma electric conductivity, ion-electron energy equipartition rate for realistic ratio of deuteron to electron mass, parallel heat conduction and ion-electron thermoforce. The code's application to modelling real experimental profiles is presently hampered by its dimensionality: the code is presently only 1D in physical space. The natural extension to 2D, with inclusion of the radial (across magnetic surfaces) dimension, would make it possible to take account of the radial transport, as well as to speed up calculations, which presently have to be done on each radial position separately. It is believed that involvement of computational experts in the code optimisation can result in achieving the above goals.