Time-Dependent Boundary Conditions During ELMs in ITER Plasma

Vasileska, Ivona; Kos, L.

doi:10.1007/s10894-020-00241-w

Cited by 3 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unchanged power balance despite the presence of kinetic effects in parallel heat flux and γ e suggests that any attempt to capture kinetic effects in a fluid framework would need to consider both phenomena. As such, approaches which treat only the modified heat flux [4] or the boundary condition [32] may not provide better predictive power than a purely fluid model.…”

Section: Discussionmentioning

confidence: 99%

Scaling laws for electron kinetic effects in tokamak scrape-off layer plasmas

et al. 2023

View full text Add to dashboard Cite

Tokamak edge (scrape-off layer) plasmas can exhibit non-local transport in the direction parallel to the magnetic field due to steep temperature gradients. This effect along with its consequences has been explored at equilibrium for a range of conditions, from sheath-limited to detached, using the 1D kinetic electron code SOL-KiT, where the electrons are treated kinetically and compared to a self-consistent fluid model. Line-averaged suppression of the kinetic heat flux (compared to Spitzer-Härm) of up to 48% is observed, contrasting with up to 57% enhancement of the sheath heat transmission coefficient, γe. Simple scaling laws in terms of basic SOL parameters for both effects are presented. By implementing these scalings as corrections to the fluid model, we find good agreement with the kinetic model for target electron temperatures. It is found that the strongest kinetic effects in γe are observed at low-intermediate collisionalities, and tend to increase (keeping upstream collisionality fixed) at increasing upstream densities and temperatures. On the other hand, the heat flux suppression is found to increase monotonically as upstream collisionality decreases. The conditions simulated include regimes relevant to current and future tokamaks.

show abstract

Section: Discussionmentioning

confidence: 99%