122 citations · 561 across the 18 of their papers we have counts for
19 papers
Demonstration of H-mode Error Field Identification in a Single Discharge via Island Healing
E. M. Bursch, A. Xie, J. L. Barr +15
Non-disruptive compass scan error field identification via island healing is demonstrated on KSTAR in a single H-mode discharge. This method can allow for up to a 75% reduction in…
Nonlinear modeling of the scaling law for the m/n=3/2 error field penetration threshold
Q. Hu, N. C. Logan, J. -K. Park +3
The scaling law for the n=2 error field (EF) penetration threshold is predicted numerically based on nonlinear single-fluid and two-fluid modeling using the TM1 code. The simulated…
Quantifying resonant drive in resistive perturbed tokamak equilibria
Matthew Pharr, Nikolas Logan, Carlos Paz-Soldan +1
Resonant drive in tokamaks is routinely quantified using a variety of different metrics that target different aspects of a resonant response to an external perturbation. Two of the…
Determining the Validity of Tokamak Perturbed Equilibrium Modeling Using Nonlinear Equilibria
J. Halpern, N. C. Logan, E. Paul +1
The prediction of perturbed equilibrium models for tokamaks with small 3D fields is strongly dependent on which reference frame for axisymmetry is assumed - for example, the toroid…
Self-consistent simulation of compressional Alfvén eigenmodes excited by runaway electrons
Chang Liu, Andrey Lvovskiy, Carlos Paz-Soldan +2
Alfvénic modes in the current quench (CQ) stage of the tokamak disruption have been observed in experiments. In DIII-D the excitation of these modes is associated with the presence…
On the minimum transport required to passively suppress runaway electrons in SPARC disruptions
R. A. Tinguely, I. Pusztai, V. A. Izzo +8
In [V.A. Izzo et al 2022 Nucl. Fusion 62 096029], state-of-the-art modeling of thermal and current quench (CQ) MHD coupled with a self-consistent evolution of runaway electron (RE)…
Runaway electron deconfinement in SPARC and DIII-D by a passive 3D coil
V. A. Izzo, I. Pusztai, K. Särkimäki +7
The operation of a 3D coil--passively driven by the current quench loop voltage--for the deconfinement of runaway electrons is modeled for disruption scenarios in the SPARC and DII…
H-mode inhibition in negative triangularity tokamak reactor plasmas
A. O. Nelson, C. Paz-Soldan, S. Saarelma
Instability to high toroidal mode number () ballooning modes has been proposed as the primary gradient-limiting mechanism for tokamak equilibria with negative triangularity (…
Latest results on quiescent and post-disruption runaway electron mitigation experiments at Frascati Tokamak Upgrade
D. Carnevale, P. Buratti, M. Baruzzo +38
Results from the last FTU campaigns on the deuterium large (wrt FTU volume) pellet REs suppression capability, mainly due to the induced burst MHD activity expelling REs seed are p…
Self-consistent simulation of resistive kink instabilities with runaway electrons
Chang Liu, Chen Zhao, Stephen C. Jardin +4
A new fluid model for runaway electron simulation based on fluid description is introduced and implemented in the magnetohydrodynamics code M3D-C1, which includes self-consistent i…
Plasma Performance and Operational Space without ELMs in DIII-D
C. Paz-Soldan
A database of DIII-D plasmas without ELMs compares the operating space and plasma performance of stationary no-ELM regimes: RMP-ELM suppression, QH-mode, I-mode, EDA H-mode, L-mode…
Non-Planar Coil Winding Angle Optimization for Compatibility with Non-Insulated High-Temperature Superconducting Magnets
Carlos Paz-Soldan
The rapidly emerging technology of high-temperature superconductors (HTS) opens new opportunities for the development of non-planar non-insulated HTS magnets. This type of HTS magn…
Runaway Electron Seed Formation at Reactor-Relevant Temperature
C. Paz-Soldan, P. Aleynikov, E. M. Hollmann +5
Systematic variation of the pre-disruption core electron temperature (Te) from 1 to 12 keV using an internal transport barrier scenario reveals a dramatic increase in the productio…
The Density Dependence of Edge-Localized-Mode Suppression and Pump-out by Resonant Magnetic Perturbations in the DIII-D Tokamak
Q. M. Hu, R. Nazikian, B. Grierson +4
The density dependence of edge-localized-mode (ELM) suppression and density pump-out (density reduction) by n = 2 resonant magnetic perturbations (RMPs) is consistent with the effe…
Experimental conditions to suppress edge localised modes by magnetic perturbations in the ASDEX Upgrade tokamak
W. Suttrop, A. Kirk, V. Bobkov +9
Access conditions for full suppression of Edge Localised Modes (ELMs) by Magnetic Perturbations (MP) in low density high confinement mode (H-mode) plasmas are studied in the ASDEX…
The effects of kinetic instabilities on the electron cyclotron emission from runaway electrons
Chang Liu, Lei Shi, Eero Hirvijoki +4
In this paper we show that the kinetic instabilities associated with runaway electron beams play an essential role for the production of high-level non-thermal electron-cyclotron-e…
Role of kinetic instability in runaway electron avalanche and elevated critical electric fields
Chang Liu, Eero Hirvijoki, Guo-yong Fu +3
The effects of kinetic whistler-wave instabilities on the runaway-electron (RE) avalanche is investigated. With parameters from DIII-D experiments, we show that RE scattering from…
Interpretation of runaway electron synchrotron and bremsstrahlung images
M. Hoppe, O. Embréus, C. Paz-Soldan +2
The crescent spot shape observed in DIII-D runaway electron synchrotron radiation images is shown to result from the high degree of anisotropy in the emitted radiation, the finite…
Resistive and ferritic-wall plasma dynamos in a sphere
I. V. Khalzov, B. P. Brown, E. J. Kaplan +5
We numerically study the effects of varying electric conductivity and magnetic permeability of the bounding wall on a kinematic dynamo in a sphere for parameters relevant to Madiso…