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Título del libro: 2013 Ieee 25th Symposium On Fusion Engineering, Sofe 2013
Título del capítulo: Equilibrium features of bean-shaped spherical tokamak plasmas with an ergodic limiter

Autores UNAM:
JOSE JULIO EMILIO HERRERA VELAZQUEZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2013
Palabras clave:

Beta limit; Equilibrium reconstruction; Ergodics; Poincare; Second-stability; Spherical Tokamak; Tokamaks; Electric load forecasting; Magnetoplasma; Plasma stability; Tokamak devices


Resumen:

Equilibrium simulations of spherical tokamak bean-shaped plasmas in natural divertor geometry with an Ohmic regime are presented for the first time. Preliminary results in a non-self-consistent scenario suggest higher (factor up to 2) beta values can be attained for these plasmas compared to the more usual spherical tokamak natural divertor D-shaped geometry. This can be attained simultaneously (but independently) with setting an edge localised ergodization as observed via a Poincaré mapping, using a low level of perturbation to the plasma current (~2 percent). In combination with the closer proximity of the bean-shaped plasmas to the in-vessel limiters (also observed here) this leads to a higher beta limit which extrapolates favorably for a more compact reactor based in the spherical tokamak concept which is thus more economical and has a more even thermal power load. © 2013 IEEE.


Entidades citadas de la UNAM: