.png){kind=icon}
.png){kind=icon}
Return
Qualitative effects of resistivity in JET-ILW Europed pedestal predictions
.png){kind=icon}
OA
AI
A
H
L
S
DOI：10.1088/1741-4326/ae5721.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The effect of resistive MHD in the pedestal predictions for JET-ILW has been investigated, using the Europed workflow (Saarelma et al 2018 Plasma Phys. Control. Fusion 60 014042) with the resistive MHD stability code CASTOR (Kerner et al 1998 J. Comput. Phys. 142 271-303). The inclusion of resistivity in the MHD stability calculations leads to a destabilisation of the peeling-ballooning modes. The effect of resistivity is shown for different plasma conditions with scans of the following parameters: the electron pedestal top density, the electron separatrix density and the normalised plasma pressure. The effect of resistivity is largely dependent on the input electron density pedestal profile, and less dependent on the normalised plasma pressure. Overall, at high temperatures, the predictions performed with ideal and resistive MHD are comparable. At low temperature, resistive effects are not negligible and the resistive MHD predictions produce a pedestal pressure height and gradient lower than ideal MHD predictions. Europed predictions with resistive MHD are also compared to experimental values from power scans and gas scans in JET-ILW. While at low gas both ideal and resistive predictions are reasonable, at high gas the resistive Europed predictions show a better agreement with the experimental pedestal height than ideal predictions. The improvement in the predictions of pedestal gradient and width using resistive MHD is instead much smaller. Due to the sensitivity of the resistive predictions to the stability threshold, the work shows that quantitative conclusions are very uncertain but, nonetheless, a qualitative improvement in the agreement with experimental results compared to ideal MHD has been observed.
Keywords:
JET
pedestal
resistivity
MHD
Europed
Journal
IF:
4
Papers:
9.3K
Citations:
2.2W
Organization
Cited Papers