Articolo in rivista, 2022, ENG, 10.1088/1361-6587/ac53ef

Modelling and theoretical understanding of the isotope effect from JET experiments in view of reliable predictions for deuterium-tritium plasmas

Garcia, J.; Casson, F. J.; Navarro, A. Banon; Bonanomi, N.; Citrin, J.; King, D.; Mantica, P.; Mariani, A.; Marin, M.; Mazzi, S.; Viezzer, E.

CEA, IRFM, St Paul Les Durance, France; CCFE, Culham Sci Ctr, Abingdon, Oxon, England; Max Planck Inst Plasma Phys, Garching, Germany; DIFFER Dutch Inst Fundamental Energy Res, Eindhoven, Netherlands; Ist Sci & Tecnol Plasmi, CNR, Milan, Italy; Aix Marseille Univ, CNRS PIIM, UMR, Marseille, France; Univ Seville, Dept Atom Mol & Nucl Phys, Seville, Spain.

This is an overview of the theoretical understanding of the so-called isotope effect in JET hydrogen versus deuterium plasmas. Experimentally, weak to moderate deviations from naive GyroBohm scaling expectations are found for the core heat transport in L and H-modes. The physical mechanisms behind such deviations are analysed in the framework of the gyrokinetic theory. In the case of particle transport, isotope effects are mostly found in the plasma edge where the density is higher in deuterium than in hydrogen plasmas. In general, both the thermal energy and particle confinement increase with increasing main ion mass. A comparison of such results to expectations for deuterium-tritium plasmas in ITER is discussed.

Plasma physics and controlled fusion (Print) 64 (5), pp. 054001-1–054001-15

Keywords

JET, theoretical, isotope

CNR authors

Mariani Alberto, Mantica Paola

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi