Dynamics of positrons during relativistic electron runaway [PDF]
, 2018 Sufficiently strong electric fields in plasmas can accelerate charged particles to relativistic energies. In this paper we describe the dynamics of positrons accelerated in such electric fields, and calculate the fraction of created positrons that become
Embréus, Ola +5 more
core +2 more sources
Observation of electrostatic fluctuations driven by runaway electrons in EAST disruptions
Nuclear Fusion, 2023 Electrostatic fluctuations driven by runaway electrons (REs) have been observed following a thermal quench during Experimental Advanced Superconducting Tokamak–intended disruptions, which are triggered by massive gas injection. Electrostatic fluctuations
T. Tang +19 more
doaj +1 more source
Effective Governance of Global Financial Markets:An Evolutionary Plan for Reform [PDF]
, 2013 Runaway electrons, which are generated in a plasma where the induced electric field exceeds a certain critical value, can reach very high energies in the MeV range.
Decker, J. +5 more
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Design of passive and structural conductors for tokamaks using thin-wall eddy current modeling
Nuclear Fusion, 2023 A new three-dimensional electromagnetic modeling tool ( ThinCurr ) has been developed using the existing PSI-Tet finite-element code in support of conducting structure design work for both the SPARC and DIII-D tokamaks.
A.F. Battey +7 more
doaj +1 more source
Alfv\'enic instabilities driven by runaways in fusion plasmas
, 2014 Runaway particles can be produced in plasmas with large electric fields. Here we address the possibility that such runaway ions and electrons excite Alfv\'enic instabilities.
Fülöp, T, Newton, S
core +1 more source
The impact of fusion-born alpha particles on runaway electron dynamics in ITER disruptions
Nuclear Fusion, 2023 In the event of a tokamak disruption in a D-T plasma, fusion-born alpha particles take several milliseconds longer to thermalise than the background. As the damping rates drop drastically following the several orders of magnitudes drop of temperature ...
A. Lier +5 more
doaj +1 more source
Quasi-linear analysis of the extraordinary electron wave destabilized by runaway electrons
, 2014 Runaway electrons with strongly anisotropic distributions present in post-disruption tokamak plasmas can destabilize the extraordinary electron (EXEL) wave.
A. Budai +7 more
core +1 more source
Influence of massive material injection on avalanche runaway generation during tokamak disruptions
, 2019 In high-current tokamak devices such as ITER, a runaway avalanche can cause a large amplification of a seed electron population. We show that disruption mitigation by impurity injection may significantly increase the runaway avalanche growth rate in such
Embréus, O +3 more
core +1 more source
Runaway electrification of friable self-replicating granular matter [PDF]
, 2013 We establish that the nonlinear dynamics of collisions between particles favors the charging of a insulating, friable, self-replicating granular material that undergoes nucleation, growth, and fission processes; we demonstrate with a minimal dynamical ...
Cartwright, Julyan H. E. +5 more
core +4 more sources
Numerical calculation of ion runaway distributions [PDF]
, 2015 Ions accelerated by electric fields (so-called runaway ions) in plasmas may explain observations in solar flares and fusion experiments, however limitations of previous analytic work have prevented definite conclusions.
Embréus, Ola +4 more
core +2 more sources