Experimental study and gyrokinetic simulations of isotope effects on core heat transport in JET tokamak deuterium and tritium plasmas

• DOI: 10.1088/1741-4326/adab04
• Publication Date: 2025-01-16T22:49:56Z
• Authors: D. Brioschi; P. Mantica; A. Mariani; N. Bonanomi; E. Delabie; J. Garcia; N. Hawkes; I. Jepu; D. Keeling; E. Lerche; E. Litherland-Smith; C.F. Maggi; S. Menmuir; G. Szepesi; D. Taylor; D. Van Eester
• Keywords: JET; Nuclear and particle physics. Atomic energy. Radioactivity; ion stiffness; gyrokinetics; QC770-798; heat transport; isotope effect

Abstract This paper presents a study on the dependence of ion temperature stiffness plasma main isotope mass in JET ITER-like wall and C discharges. To this aim, database H, D T shots is analyzed, including new dedicated shots, comparing experiments with lower higher power injected by NBI system. In order to characterize turbulence mass, three these discharges (two one D) same external heating scheme are studied detail interpreted gyrokinetic linear nonlinear simulations. The analysis performed at fixed radius ρtor = 0.33, selected maximize electromagnetic stabilizing effects turbulence, both from thermal suprathermal particles. experimental results show clear reduction when heavier isotopes considered, thus moving H T, which attributed an increasing stabilization mass.