Transport Simulation of Internal Transport Barrier Formation Using Ballooning Type Transport Model
Abstract
Predictive simulation of tokamak transport is one of the key issues in burning plasma operation. Various transport models have been prepared and examined, but the formation of internal transport barrier has not been understood well. We consider a ballooning type transport model in which the transport coefficient is reduced as s-α decreases, where s is the magnetic shear and α is the nonlinear pressure gradient associated with the Shafranov shift. Typical examples of this model are the current diffusive ballooning mode (CDBM) and the drift Alfvén ballooning mode (DABM). We include these models in the one-dimensional transport code TASK/TR and combine it with the two-dimensional equilibrium code TASK/EQ. We simulate the internal transport barrier formation and the current hole generation. We also make a comparison between the simulation results and the experimental profiles in JT-60U and ITPA databases.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2003
- Bibcode:
- 2003APS..DPPLP1081H