scholarly journals Energetic electron transport in the presence of magnetic perturbations in magnetically confined plasmas

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
G. Papp ◽  
M. Drevlak ◽  
G. I. Pokol ◽  
T. Fülöp
Keyword(s):  
Test Particle ◽  
Energetic Electron ◽  
Three Dimensional ◽  
Confined Plasmas ◽  
Magnetically Confined ◽  
Magnetic Perturbations ◽  
Open Region ◽  
Particle Simulations ◽  
Drift Orbits ◽  
Magnetically Confined Plasmas

The transport of energetic electrons is sensitive to magnetic perturbations. By using three-dimensional numerical simulation of test particle drift orbits we show that the transport of untrapped electrons through an open region with magnetic perturbations cannot be described by a diffusive process. Based on our test particle simulations, we propose a model that leads to an exponential loss of particles.

scholarly journals Local Stability Analysis of Three-dimensional Magnetically Confined Plasmas

1997 ◽  
Vol 50 (5) ◽  
pp. 921 ◽  
Author(s):  
J. L. V. Lewandowski
Keyword(s):  
Stability Analysis ◽  
Phase Angle ◽  
Local Stability ◽  
Three Dimensional ◽  
Magnetic Shear ◽  
Confined Plasmas ◽  
Fluid Displacement ◽  
Local Stability Analysis ◽  
Magnetically Confined ◽  
Magnetically Confined Plasmas

Local stability analysis of three-dimensional magnetically confined plasmas is presented using the energy principle. Fluid displacements with long parallel wavelengths by short perpendicular are retained. To lowest order in the mode fluteness the total energy density variation depends on the local magnetic shear, normal and geodesic magnetic curvatures, parallel current density, and magnetic field strength. The perpendicular fluid displacement is written in terms of a slowly-varying amplitude and a phase angle which varies rapidly in (or across) the magnetic surface. Assuming that the fluid displacement is quasi-incompressible, the solution for the phase angle is found in two limiting cases. Local stability analysis of stellarators with low or strong global magnetic shear is discussed.

scholarly journals The field line map approach for simulations of magnetically confined plasmas

2016 ◽  
Vol 198 ◽  
pp. 139-153 ◽  
Author(s):  
Andreas Stegmeir ◽  
David Coster ◽  
Omar Maj ◽  
Klaus Hallatschek ◽  
Karl Lackner
Keyword(s):  
Field Line ◽  
Confined Plasmas ◽  
Magnetically Confined ◽  
Magnetically Confined Plasmas ◽  
Map Approach

scholarly journals Turbulent transport across shear layers in magnetically confined plasmas

2014 ◽  
Vol 21 (10) ◽  
pp. 102304 ◽  
Author(s):  
B. Nold ◽  
P. Manz ◽  
T. T. Ribeiro ◽  
G. Fuchert ◽  
G. Birkenmeier ◽  
...  
Keyword(s):  
Turbulent Transport ◽  
Shear Layers ◽  
Confined Plasmas ◽  
Magnetically Confined ◽  
Magnetically Confined Plasmas

A complex probe for measurements of turbulence in the edge of magnetically confined plasmas

1997 ◽  
Vol 68 (12) ◽  
pp. 4418-4423 ◽  
Author(s):  
R. M. Castro ◽  
M. V. A. P. Heller ◽  
R. P. da Silva ◽  
I. L. Caldas ◽  
F. T. Degasperi ◽  
...  
Keyword(s):  
Confined Plasmas ◽  
Magnetically Confined ◽  
Magnetically Confined Plasmas
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