An improved theory of the response of DIII-D H-mode discharges to static resonant magnetic perturbations and its implications for the suppression of edge localized modes

2020 ◽  
Vol 27 (7) ◽  
pp. 072501
Author(s):  
R. Fitzpatrick ◽  
A. O. Nelson
Keyword(s):  
Localized Modes ◽  
Magnetic Perturbations ◽  
Edge Localized Modes ◽  
Resonant Magnetic Perturbations

Physics of penetration of resonant magnetic perturbations used for Type I edge localized modes suppression in tokamaks

2009 ◽  
Vol 49 (8) ◽  
pp. 085011 ◽  
Author(s):  
M. Bécoulet ◽  
G. Huysmans ◽  
X. Garbet ◽  
E. Nardon ◽  
D. Howell ◽  
...  
Keyword(s):  
Type I ◽  
Localized Modes ◽  
Magnetic Perturbations ◽  
Edge Localized Modes ◽  
Resonant Magnetic Perturbations

Non-linear MHD modelling of Edge Localized Modes suppression by Resonant Magnetic Perturbations in ITER

2022 ◽  
Author(s):  
Marina Becoulet ◽  
Guido Huijsmans ◽  
Chantal Passeron ◽  
Yueqiang Liu ◽  
Todd E Evans ◽  
...  
Keyword(s):  
Turbulent Transport ◽  
Heat Fluxes ◽  
Total Power ◽  
Computational Domain ◽  
Localized Modes ◽  
Mode Behavior ◽  
Non Linear ◽  
Magnetic Perturbations ◽  
Edge Localized Modes ◽  
Resonant Magnetic Perturbations

Abstract Edge Localized Modes (ELMs) suppression by Resonant Magnetic Perturbations (RMPs) was studied with the non-linear MHD code JOREK for the ITER H-mode scenarios at 15MA,12.5MA,10MA/5.3T. The main aim of this work was to demonstrate that ELMs can be suppressed by RMPs while the divertor 3D footprints of heat and particle fluxes remain within divertor material limits. The unstable peeling-ballooning modes responsible for ELMs without RMPs were modelled first for each scenario using numerically accessible parameters for ITER. Then the stabilization of ELMs by RMPs was modelled with the same parameters. RMP spectra, optimized by the linear MHD MARS-F code, with main toroidal harmonics N=2, N=3, N=4 have been used as boundary conditions of the computational domain of JOREK, including realistic RMP coils, main plasma, Scrape Off Layer (SOL) divertor and realistic first wall. The model includes all relevant plasma flows: toroidal rotation, two fluid diamagnetic effects and neoclassical poloidal friction. With RMPs, the main toroidal harmonic and the non-linearly coupled harmonics remain dominant at the plasma edge, producing saturated modes and a continuous MHD turbulent transport thereby avoiding ELM crashes in all scenarios considered here. The threshold for ELM suppression was found at a maximum RMP coils current of 45kAt-60kAt compared to the coils maximum capability of 90kAt. In the high beta poloidal steady-state 10MA/5.3T scenario, a rotating QH-mode without ELMs was observed even without RMPs. In this scenario with RMPs N=3, N=4 at 20kAt maximum current in RMP coils, similar QH-mode behavior was observed however with dominant edge harmonic corresponding to the main toroidal number of RMPs. The 3D footprints with RMPs show the characteristic splitting with the main RMP toroidal symmetry. The maximum radial extension of the footprints typically was ~20 cm in inner divertor and ~40 cm in outer divertor with stationary heat fluxes decreasing further out from the initial strike point from ~5MW/m2 to ~1MW/m2 assuming a total power in the divertor and walls is 50MW.

Edge localized modes control by resonant magnetic perturbations

2007 ◽  
Vol 363-365 ◽  
pp. 1071-1075 ◽  
Author(s):  
E. Nardon ◽  
M. Bécoulet ◽  
G. Huysmans ◽  
O. Czarny ◽  
P.R. Thomas ◽  
...  
Keyword(s):  
Localized Modes ◽  
Magnetic Perturbations ◽  
Edge Localized Modes ◽  
Resonant Magnetic Perturbations

Mitigation of large amplitude edge-localized modes by resonant magnetic perturbations on LHD

2014 ◽  
Vol 54 (3) ◽  
pp. 033001 ◽  
Author(s):  
K. Toi ◽  
S. Ohdachi ◽  
Y. Suzuki ◽  
F. Watanabe ◽  
K. Tanaka ◽  
...  
Keyword(s):  
Large Amplitude ◽  
Localized Modes ◽  
Magnetic Perturbations ◽  
Edge Localized Modes ◽  
Resonant Magnetic Perturbations

Numerical study of the resonant magnetic perturbations for Type I edge localized modes control in ITER

2008 ◽  
Vol 48 (2) ◽  
pp. 024003 ◽  
Author(s):  
M. Bécoulet ◽  
E. Nardon ◽  
G. Huysmans ◽  
W. Zwingmann ◽  
P. Thomas ◽  
...  
Keyword(s):  
Numerical Study ◽  
Type I ◽  
Localized Modes ◽  
Magnetic Perturbations ◽  
Edge Localized Modes ◽  
Resonant Magnetic Perturbations
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