Fusion plasmas exhibit exotic transport channels ranging from the relatively simple resonant interaction of plasma waves and particle orbits all the way to fully non-linear quasi-2D turbulent transport. These phenomena play an essential role in many of the critical issues of a future fusion power plant. Advanced transport simulation codes have been developed around the world, aiming to describe these phenomena with an accuracy enabling predictive simulations of future devices. Many of these simulation tools are already in the stage of qualitatively reproducing experimental observations, and some quantitative validations were also attempted with some success. Quantitative comparisons are hindered by the measurement capabilities of the diagnostic systems of the experiments. One solution to account for the artefacts of the measurement systems is to include them in the simulations as synthetic diagnostics.
BME NTI has a long tradition of developing synthetic diagnostics for the purpose of system design and aiding measurement evaluation. The most advanced such synthetic diagnostic is RENATE for beam emission spectroscopy. There is a major effort in the fusion community to integrate these all possible synthetic diagnostic simulations into integrated modelling frameworks which then can be used to validate the first-principle plasma transport codes to experimental measurements.
This doctoral research topic aims to continue and refine the integration of RENATE into the ITER Modelling and Analysis Suite (IMAS) and use it - along with the other synthetic diagnostics there - to validate first-principle plasma transport codes. We already have contacts to a wide range of first-principle codes striving for validation opportunities. Some simulate edge turbulence or non-linear MHD instabilities, but the most intriguing ones simulate the resonant interplay of fast particles and plasma waves. The doctoral work will concentrate on these wave-particle interactions, which we already know quite well from the experimental side. However, the integrated modelling framework will allow taking part in other validation efforts, as well.
This topic requires both sufficient programming skills in high-level languages and a right attitude towards experimental data analysis. Excellent collaboration skills and good command of the professional English language is needed due to the extensive collaboration framework.