27 citations · 54 across the 7 of their papers we have counts for
7 papers
Runaway Electrons in Stellarators: Unlikely or Unavoidable?
Ida Ekmark, Matt Landreman
Generation of relativistic runaway electrons has historically not been considered a possible problem in stellarators, but this may not hold in reactor-scale stellarators despite th…
An analytical criterion for significant runaway electron generation in activated tokamaks
Björn Zaar, István Pusztai, Ida Ekmark +1
A disrupting plasma in a high-performance tokamak such as ITER or SPARC may generate large runaway electron currents that, upon impact with the tokamak wall, can cause serious dama…
Thermal modeling of runaway electron induced damage in the SPARC tokamak
T. Rizzi, K. Paschalidis, S. Ratynskaia +6
The integrity of plasma-facing components (PFCs) in tokamaks is critically challenged by transient events such as runaway electron (RE) impacts. We report the first systematic anal…
Runaway electron generation in disruptions mitigated by deuterium and noble gas injection in SPARC
I. Ekmark, M. Hoppe, R. A. Tinguely +3
One of the critical challenges in future high current tokamaks is the avoidance of runaway electrons during disruptions. Here, we investigate disruptions mitigated with combined de…
Fluid and kinetic studies of tokamak disruptions using Bayesian optimization
Ida Ekmark, Mathias Hoppe, Tünde Fülöp +4
When simulating runaway electron dynamics in tokamak disruptions, fluid models with lower numerical cost are often preferred to more accurate kinetic models. The aim of this work i…
Bayesian optimization of massive material injection for disruption mitigation in tokamaks
Istvan Pusztai, Ida Ekmark, Hannes Bergström +5
A Bayesian optimization framework is used to investigate scenarios for disruptions mitigated with combined deuterium and neon injection in ITER. The optimization cost function take…
Runaway electron generation during tokamak start-up
M. Hoppe, I. Ekmark, E. Berger +1
Tokamak start-up is characterized by low electron densities and strong electric fields, in order to quickly raise the plasma current and temperature, allowing the plasma to fully i…