Conveners
3D Equilibrium & High Beta Physics: EX/8 & TH/7
- Akio Komori (Japan)
Mr
Yasuhiro Suzuki
(Japan)
10/12/12, 8:30 AM
EXS - Magnetic Confinement Experiments: Stability
Oral Presentation
In the LHD experiments, the volume averaged beta value was achieved to 5% in the quasi-steady state. For such high-beta plasmas, the change of the magnetic field structure is expected. Since the magnetic field of the LHD is intrinsically 3D structure, the plasma current flowing along 3D field lines drives perturbed field to break nested flux surfaces for the vacuum field, so-called the "3D...
Mr
Wilfred A. Cooper
(Switzerland)
10/12/12, 8:50 AM
THS - Magnetic Confinement Theory and Modelling: Stability
Oral Presentation
Tokamaks with weak to moderate reversed central magnetic shear in which the minimum of the inverse rotational transform q_min is in the neighbourhood of unity can trigger bifurcated MagnetoHydroDynamic (MHD) equilibrium states. In addition to the standard axisymmetric branch that can be obtained with standard Grad-Shafranov solvers, a novel branch with a three-dimensional (3D) helical core has...
Mr
Yasushi Ono
(Japan)
10/12/12, 9:10 AM
EXW - Magnetic Confinement Experiments: Wave–plasma interactions; current drive; heating; energetic particles
Oral Presentation
The high-power reconnection heating of spherical tokamak (ST) has been studied in TS-3 merging experiment as a promising solenoid (CS)-less startup and also as a new type of efficient heating method. Our 2-D measurements of plasma flow, magnetic field, ion temperature T_i and electron density has first verified the mechanism of merging formation of the high-beta ST with significant ion heating...
Mr
James Hanson
(Auburn University)
10/12/12, 9:30 AM
THC - Magnetic Confinement Theory and Modelling: Confinement
Oral Presentation
Equilibrium reconstruction is the process of minimizing the mismatch between modeled and observed signals by changing the parameters that specify the equilibrium. While stellarator equilibria are inherently non-axisymmetric, non-axisymmetric effects are also crucial for understanding stability and confinement of high-performance reversed field pinch and tokamak plasmas. Therefore,...
Mr
Vasily Gusev
(Russian Federation)
10/12/12, 9:50 AM
EXW - Magnetic Confinement Experiments: Wave–plasma interactions; current drive; heating; energetic particles
Oral Presentation
The spherical tokamak Globus-M has largely reached its projected parameters. Some of the deficiencies, which do not allow to cross the present operational range have been identified. The experimental basis and the recognition of the reasons for limitations form the basis for the parameter definition of the next step, Globus M2. In this paper we report on the major findings on Globus-M...
