80 citations · 1.2k across the 62 of their papers we have counts for
10 papers · 1 filter
Edge Momentum Transport by Neutrals: an Interpretive Numerical Framework
J. T. Omotani, S. L. Newton, I. Pusztai +3
Due to their high cross-field mobility, neutrals can contribute to momentum transport even at the low relative densities found inside the separatrix and they can generate intrinsic…
Edge rotation from momentum transport by neutrals
JT Omotani, SL Newton, I Pusztai +1
Due to their high cross field mobility, neutral atoms can have a strong effect on transport even at the low relative densities found inside the separatrix. We use a charge-exchange…
Runaway-electron formation and electron slide-away in an ITER post-disruption scenario
A. Stahl, O. Embréus, M. Landreman +2
Mitigation of runaway electrons is one of the outstanding issues for the reliable operation of ITER and other large tokamaks, and accurate estimates for the expected runaway-electr…
NORSE: A solver for the relativistic non-linear Fokker-Planck equation for electrons in a homogeneous plasma
A. Stahl, M. Landreman, O. Embréus +1
Energetic electrons are of interest in many types of plasmas, however previous modeling of their properties has been restricted to the use of linear Fokker-Planck collision operato…
Relativistic Vlasov-Maxwell modelling using finite volumes and adaptive mesh refinement
Benjamin Svedung Wettervik, Timothy Charles DuBois, Evangelos Siminos +1
The dynamics of collisionless plasmas can be modelled by the Vlasov-Maxwell system of equations. An Eulerian approach is needed to accurately describe processes that are governed b…
Plasma rotation from momentum transport by neutrals in tokamaks
John Omotani, István Pusztai, Tünde Fülöp
Neutral atoms can strongly influence the intrinsic rotation and radial electric field at the tokamak edge. Here, we present a framework to investigate these effects when the neutra…
Effect of bremsstrahlung radiation emission on fast electrons in plasmas
Ola Embréus, Adam Stahl, Tünde Fülöp
Bremsstrahlung radiation emission is an important energy loss mechanism for energetic electrons in plasmas. In this paper we investigate the effect of spontaneous bremsstrahlung em…
Kinetic and finite ion mass effects on the transition to relativistic self-induced transparency in laser-driven ion acceleration
E. Siminos, M. Grech, B. Svedung Wettervik +1
We study kinetic effects responsible for the transition to relativistic self-induced transparency in the interaction of a circularly-polarized laser-pulse with an overdense plasma…
Turbulent transport of MeV range cyclotron heated minorities as compared to alpha particles
István Pusztai, George J. Wilkie, Yevgen O. Kazakov +1
We study the turbulent transport of an ion cyclotron resonance heated (ICRH), MeV range minority ion species in tokamak plasmas. Such highly energetic minorities, which can be prod…
Kinetic modelling of runaway electrons in dynamic scenarios
A. Stahl, O. Embréus, G. Papp +2
Improved understanding of runaway-electron formation and decay processes are of prime interest for the safe operation of large tokamaks, and the dynamics of the runaway electrons d…