Results 11 to 20 of about 455,514 (173)

Non-linear modeling of the threshold between ELM mitigation and ELM suppression by resonant magnetic perturbations in ASDEX upgrade [PDF]

Physics of Plasmas, 2019
The interaction between Edge-Localized Modes (ELMs) and Resonant Magnetic Perturbations (RMPs) is modeled with the magnetohydrodynamic code JOREK using experimental parameters from ASDEX Upgrade discharges. According to the modeling, the ELM mitigation or suppression is optimal when the amplification of both tearing and peeling-kink responses results ...
F. Orain, M. Hoelzl, F. Mink, M. Willensdorfer, M. Bécoulet, M. Dunne, S. Günter, G. Huijsmans, K. Lackner, S. Pamela, W. Suttrop, E. Viezzer   +11 more
openaire   +11 more sources

Extension of ELM suppression window using n=4 RMPs in EAST [PDF]

, 2023
25 pages, 11 ...
Xie, P., Sun, Y., Ma, Q., Gu, S., Liu, Y. Q., Jia, M., Loarte, A., Wu, X., Chang, Y., Jia, T., Zhang, T., Zhou, Z., Zang, Q., Lyu, B., Fu, S., Sheng, H., Ye, C., Yang, H., Wang, H. H., Contributors, EAST   +19 more
core   +4 more sources

Plasma performance and operational space with an RMP-ELM suppressed edge

Nuclear Fusion
The operational space and global performance of plasmas with edge-localized modes (ELMs) suppressed by resonant magnetic perturbations (RMPs) are surveyed by comparing AUG, DIII-D, EAST, and KSTAR stationary operating points.
C. Paz-Soldan, S. Gu, N. Leuthold, P. Lunia, P. Xie, M.W. Kim, S.K. Kim, N.C. Logan, J.-K. Park, W. Suttrop, Y. Sun, D.B. Weisberg, M. Willensdorfer, the ASDEX Upgrade Team, the DIII-D Team, the EAST Team, the KSTAR Team   +16 more
doaj   +3 more sources

Predicted thresholds for RMP ELM suppression access in double-null configurations

Nuclear Fusion
Modeling of DIII-D plasmas spanning shapes from single to double-null (DN) reveals new insights into the nature of resonant magnetic perturbation (RMP) conditions necessary for edge-localized mode (ELM) suppression.
P. Lunia, A.V. Dudkovskaia, N.C. Logan, N. Leuthold, B.C. Lyons, C. Paz-Soldan, M.W. Shafer   +6 more
doaj   +2 more sources

Metrics and extrapolation of resonant magnetic perturbation thresholds for ELM suppression

Nuclear Fusion
This large database study of resonant magnetic perturbation (RMP) edge localized mode (ELM) suppression thresholds in the AUG, DIII-D, EAST, and KSTAR tokamaks details the key strengths and weaknesses of RMP metrics. The RMP ELM suppression database used
N.C. Logan, S.K. Kim, S.M. Yang, J.-K. Park, Q. Hu, N. Leuthold, C. Paz-Soldan, S. Gu, D. Weisberg, H. Wang, Y. Sun, P. Xie, G. Nina Montano, T. Wang, M.W. Kim, M. Willensdorfer, EUROfusion WPTE Team, the ASDEX Upgrade Team   +17 more
doaj   +3 more sources

Unified ELM suppression on KSTAR and DIII-D via adaptive feedback control strategies

Nuclear Fusion
This paper reports on the extension of our amplitude-based resonant magnetic perturbation (RMP) edge localized mode (ELM) controller to support phasing control (relative toroidal phases of RMP waveforms between rows of coils), multiple toroidal mode ...
R. Shousha, S.K. Kim, K.G. Erickson, S.H. Hahn, A.O. Nelson, N.C. Logan, S.M. Yang, Q.M. Hu, R. Wilcox, J.-K. Park, C. Paz-Soldan, A. Battey, M.W. Kim, G. Shin, W.H. Ko, Y.M. Jeon, J.H. Lee, J. Jang, D.C. Seo, J. Abbate, A. Rothstein, E. Kolemen   +21 more
doaj   +2 more sources

Permanent magnets for ELM suppression in tokamaks: feasibility and operational compatibility

Nuclear Fusion
Permanent magnets can provide static magnetic fields without power supplies or feed lines, offering a simpler alternative to conventional electromagnets in tokamaks.
S.M. Yang, A. Bortolon, Q. Hu, S.K. Kim, D. Mauzey   +4 more
doaj   +2 more sources

ELM suppression in helium plasmas with 3D magnetic fields

Nuclear Fusion, 2017
Experiments in DIII-D, using non-axisymmetric magnetic perturbation fields in high-purity low toroidal rotation, He-4 plasmas have resulted in Type-I edge localized mode (ELM) suppression and mitigation. Suppression is obtained in plasmas with zero net input torque near the L-H power threshold using either electron cyclotron resonant heating (ECRH) or ...
T.E. Evans, A. Loarte, D.M. Orlov, B.A. Grierson, M.M. Knölker, B.C. Lyons, L. Cui, P. Gohil, R.J. Groebner, R.A. Moyer, R. Nazikian, T.H. Osborne, E.A. Unterberg   +12 more
openaire   +2 more sources

Argon–seeded detachment during ELM control by RMPs in KSTAR

Nuclear Fusion, 2023
In this study, we demonstrate argon-seeded discharges that exhibited a detached divertor during the full suppression and mitigation of edge-localized modes (ELMs) by an International Thermonuclear Experimental Reactor-like, three-row resonant magnetic ...
H. Shin, J. Hwang, Y. Han, G. Shin, H. Lee, K.-B. Chai, Wonho Choe   +6 more
doaj   +1 more source

Edge stability of stationary ELM-suppressed regimes on DIII-D

Journal of Physics: Conference Series, 2008
We discuss the MHD stability of the H-mode pedestal region in two edge localized mode (ELM)-suppressed H-mode regimes on DIII-D, the quiescent (Q)H-mode and resonant magnetic perturbation (RMP) H-mode. The QH-mode is obtained at low density with most of the neutral beam power injected counter to the plasma current, and is characterized by a continuous,
T H Osborne, P B Snyder, K H Burrell, T E Evans, M E Fenstermacher, A W Leonard, R A Moyer, M J Schaffer, W P West   +8 more
openaire   +1 more source