Progress towards a Whole Device Model based on TRANSP

TRANSP [1] is a time-dependent 1.5D equilibrium and transport solver, used for modeling of tokamak plasma discharges and for experimental planning. TRANSP incorporates state of the art heating/current drive sources and transport models, implemented in a solver (PT-SOLVER) that is especially suited to treat stiff turbulence transport. With increasing number of users worldwide and with the upcoming ITER era, TRANSP is facing a new challenge: reducing the computational burden without compromising the physics fidelity. The code is undergoing substantial modernization for improved portability, as well as modularization towards compatibility with the ITER Modeling and Analysis Suite (IMAS) Interface Data Structure. Physics upgrades currently ongoing include MHD stability and Energetic Particle stability calculations and their effect on fast ion transport. A major upgrade of the code is the coupling with the Scrape-Off Layer.