Articolo in rivista, 2021, ENG, 10.1088/1741-4326/abfb12

Benchmark of quasi-linear models against gyrokinetic single scale simulations in deuterium and tritium plasmas for a JET high beta hybrid discharge

Mariani A.; Mantica P.; Casiraghi I.; Citrin J.; Gorler T.; Staebler G.M.

Istituto per la Scienza e Tecnologia Dei Plasmi, CNR, Milano, Italy; Dipartimento di Fisica 'G. Occhialini', Universita di Milano-Bicocca, Milano, Italy; DIFFER-Dutch Institute for Fundamental Energy Research, Eindhoven, Netherlands; Eindhoven University of Technology, Eindhoven, Netherlands; Max-Planck-Institut für Plasmaphysik, Garching, Germany; General Atomics, San Diego, CA, USA.

A benchmark of the reduced quasi-linear models QuaLiKiz and TGLF with GENE gyrokinetic simulations has been performed for parameters corresponding to a JET high performance hybrid pulse in deuterium. Given the importance of the study of such advanced scenarios in view of ITER and DEMO operations, the dependence of the transport on the ion isotope mass has also been assessed, by repeating the benchmark changing the ion isotope to tritium. TGLF agrees better with GENE on the linear spectra and the flux levels. However, concerning the isotope dependence, only QuaLiKiz reproduces the GENE radial trend of a basically gyro-Bohm (gB) scaling at inner radii and instead anti-gB at outer radii. The physics effects which are responsible of the antigB effect in GENE simulations have been singled out.

Nuclear fusion 61 (6), pp. 066032-1–066032-15

Keywords

gyrokinetics, heat transport, quasi-linear models, isotope effect, JET, hybrid scenario

CNR authors

Mariani Alberto, Mantica Paola

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi