We present recent developments to the one-dimensional transport solver ASTRA, which will enable the simulation of plasma evolution in both tokamaks and stellarators. To achieve this, a generic current diffusion equation for the poloidal magnetic flux is derived and implemented, together with a coupling to the VMEC equilibrium code. The model is benchmarked against theoretical expectations and validated using experimental data from Wendelstein 7-X, demonstrating that ASTRA can accurately reproduce the evolution of the toroidal current and qualitatively reproduce the occurrence of sawtooth-like instabilities resulting from the rotational transform profile crossing resonant surfaces. With these advancements, ASTRA provides a unified tool for transport studies across different magnetic confinement concepts.
Integrated modeling of H-mode tokamak discharges with ASTRA and B2SOLPS numerical codes