scholarly journals Numerical simulation of runaway electrons: 3-D effects on synchrotron radiation and impurity-based runaway current dissipation

2018 ◽  
Vol 25 (5) ◽  
pp. 056104 ◽  
Author(s):  
D. del-Castillo-Negrete ◽  
L. Carbajal ◽  
D. Spong ◽  
V. Izzo
Keyword(s):  
Numerical Simulation ◽  
Synchrotron Radiation ◽  
Runaway Electrons ◽  
Current Dissipation

scholarly journals Kinetic modelling of runaway electron generation in argon-induced disruptions in ASDEX Upgrade

2020 ◽  
Vol 86 (4) ◽  
Author(s):  
K. Insulander Björk ◽  
G. Papp ◽  
O. Embreus ◽  
L. Hesslow ◽  
T. Fülöp ◽  
...  
Keyword(s):  
Runaway Electron ◽  
Kinetic Modelling ◽  
Electron Distribution Function ◽  
Real Space ◽  
Tokamak Plasmas ◽  
Runaway Electrons ◽  
Plateau Phase ◽  
Electron Generation ◽  
Current Dissipation ◽  
Threshold Amount

Massive material injection has been proposed as a way to mitigate the formation of a beam of relativistic runaway electrons that may result from a disruption in tokamak plasmas. In this paper we analyse runaway generation observed in eleven ASDEX Upgrade discharges where disruption was triggered using massive gas injection. We present numerical simulations in scenarios characteristic of on-axis plasma conditions, constrained by experimental observations, using a description of the runaway dynamics with a self-consistent electric field and temperature evolution in two-dimensional momentum space and zero-dimensional real space. We describe the evolution of the electron distribution function during the disruption, and show that the runaway seed generation is dominated by hot-tail in all of the simulated discharges. We reproduce the observed dependence of the current dissipation rate on the amount of injected argon during the runaway plateau phase. Our simulations also indicate that above a threshold amount of injected argon, the current density after the current quench depends strongly on the argon densities. This trend is not observed in the experiments, which suggests that effects not captured by zero-dimensional kinetic modelling – such as runaway seed transport – are also important.

Numerical simulation of a soft-x-ray Li laser pumped with synchrotron radiation

1985 ◽  
Vol 32 (1) ◽  
pp. 357-366 ◽  
Author(s):  
Balazs Rozsnyai ◽  
Hiroshi Watanabe ◽  
Paul L. Csonka
Keyword(s):  
Numerical Simulation ◽  
Synchrotron Radiation ◽  
X Ray

Analysis of synchrotron radiation spectra of runaway electrons in Tokamak

2017 ◽  
Vol 24 (12) ◽  
pp. 124504
Author(s):  
M. Xiao ◽  
R. J. Zhou ◽  
L. Q. Hu ◽  
Y. K. Zhang ◽  
Keyword(s):  
Synchrotron Radiation ◽  
Runaway Electrons ◽  
Radiation Spectra

Observation of infrared synchrotron radiation from tokamak runaway electrons in TEXTOR

1990 ◽  
Vol 30 (5) ◽  
pp. 859-870 ◽  
Author(s):  
K.H. Finken ◽  
J.G. Watkins ◽  
D. Rusbüldt ◽  
W.J. Corbett ◽  
K.H. Dippel ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Runaway Electrons

Numerical simulation of experimental resonance absorption spectra and diffraction of synchrotron radiation in yttrium iron garnet

2006 ◽  
Vol 51 (2) ◽  
pp. 192-200 ◽  
Author(s):  
A. M. Kolchinskaya ◽  
A. N. Artem’ev ◽  
V. E. Dmitrienko ◽  
F. V. Zabelin ◽  
A. G. Maevskiĭ ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Synchrotron Radiation ◽  
Absorption Spectra ◽  
Yttrium Iron Garnet ◽  
Resonance Absorption ◽  
Yttrium Iron ◽  
Iron Garnet
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