5 papers
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…
Batch Bayesian optimization of attosecond betatron pulses from laser wakefield acceleration
Dominika Maslarova, Albert Hansson, Mufei Luo +4
Laser wakefield acceleration can generate a femtosecond-scale broadband X-ray betatron radiation pulse from electrons accelerated by an intense laser pulse in a plasma. The microme…
The effect of plasmoid drifts on the pellet rocket effect in magnetic confinement fusion plasmas
N. J. Guth, O. Vallhagen, P. Helander +4
We detail here a semi-analytical model for the pellet rocket effect, which describes the acceleration of pellets in a fusion plasma due to asymmetries in the heat flux reaching the…
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…
Eulerian and Lagrangian electron energization during magnetic reconnection
Konrad Steinvall, Louis Richard, Tünde Fülöp +2
Electron energization by magnetic reconnection has historically been studied in the Lagrangian guiding-center framework. Insights from such studies include that Fermi acceleration…