Abstract Details
Abstracts
Author: Lucas F. McConnell Montoya
Requested Type: Poster
Submitted: 2025-03-16 10:39:43
Co-authors: M. A. Barnes, J. T. Omotani, S. L. Newton, F. I. Parra
Contact Info:
Oxford University
St. John's college
Oxford, Oxfordshire OX1 3JP
United Kingdom
Abstract Text:
The Scrape-Off-Layer of a tokamak must be understood well so as to mitigate heat loads on the plasma facing components. Fluid codes assume a highly collisional plasma, but kinetic effects are still important in the SOL, for example near the walls or when estimating the random heat flux of particles. Using the novel moment kinetics code, a 1D simulation of plasma along a single field line in the edge of a tokamak has been simulated using both a 1D1V kinetic treatment and a 1D fluid treatment. Using a collisional heat flux closure for the fluid equations with the Krook operator, the fluid simulations are shown to strongly agree with corresponding kinetic simulations in the highly collisional limit. However, in more collisionless regimes typical of tokamak edge plasmas, the profiles vary by order unity. The comparison of results between the two codes in different collisional regimes highlights the importance of kinetic modelling in the edge, especially in the context of impurity transport.
Characterization: 2.0
Comments: