Sumários
The plasma physics of fusion energy 18
20 dezembro 2018, 16:00 • João Pedro Saraiva Bizarro
Magnetic fusion concepts: the tokamak (the circular cross section tokamak – equilibrium: the aspect ratio expansion, the equilibrium β limit (cont.); the circular cross section tokamak – stability: the plasma contribution, the vacuum contribution, the pressure balance matching condition, the β/ε → 0 kink instability, the βq2/ε → π2/16 ballooning-kink instability).
The plasma physics of fusion energy 17
18 dezembro 2018, 17:00 • João Pedro Saraiva Bizarro
Magnetic fusion concepts: the surface current model (the 2-D surface current equilibrium, the perturbed magnetic field in the plasma, the perturbed magnetic field in the vacuum, the pressure balance matching condition,summary of the model); the tokamak (overview of the tokamak, the circular cross section tokamak – equilibrium: the aspect ratio expansion, the equilibrium β limit).
The plasma physics of fusion energy 16
11 dezembro 2018, 17:00 • João Pedro Saraiva Bizarro
MHD – macroscopic stability: classifications of MHD instabilities (internal and external modes, pressure-driven and current-driven modes, conducting wall vs. no wall configurations); a physical picture of MHD instabilities (interchange modes, ballooning modes, current-driven instabilities); the general formulation of the ideal MHD stability problem (the concept of linear stability, the MHD linear stability equations); the general formulation of the ideal MHD stability problem (a general property of linear MHD stability); the infinite homogeneous plasma – MHD waves (general derivation of MHD waves, the shear Alfvén wave).
The plasma physics of fusion energy 15
6 dezembro 2018, 16:00 • João Pedro Saraiva Bizarro
MHD – macroscopic equilibrium: calculating the rotational transform (rotational transform in a straight cylinder, rotational transform in an axisymmetric torus).
MHD – macroscopic stability: general concepts of stability (instabilities in physical systems, the frozen-in-field-line concept).