19th Technical Meeting on Energetic Particles in Magnetic Confinement Systems

Session

Non-linear EP physics

1 Oct 2026, 11:20

Beaulieu Congress and Exhibition Center (Lausanne, Switzerland)

25. Phase-space mechanisms of ICRF-driven bursting shear Alfvén waves and their suppression via phase-space engineering

Jialei Wang (National Institute for Fusion Science)

01/10/2026, 11:20

Nonlinear EP physics

Invited

Recurrent bursting Alfvénic instabilities can severely degrade energetic-particle (EP) confinement and impose transient loads on plasma-facing components. We recently reported the first comprehensive simulations of ICRF-heated tokamak plasmas on the slowing-down timescale with the kinetic-MHD hybrid code MEGA, where shear Alfvén wave induced minority ion transport is self-consistently retained...

78. Self saturation of Alfén eigenmodes with a reactor-like low ρ*

Eric Bass

01/10/2026, 11:55

Nonlinear EP physics

Oral

A new self-saturation regime for energetic particle (EP) driven Alfvén eigenmodes (AEs) at reactor-like ρ is identified using the CGYRO [1] gyrokinetic flux-tube code. This new saturation regime could markedly reduce the predicted impact of AEs in future reactors. Previous nonlinear gyrokinetic flux-tube studies [2,3] of fast ion-driven AEs at higher values of ρ associated with modern...

29. Nonlinear wave-particle interaction and dynamics of energetic particle mode

Dr Pengjuan Su (Key Laboratory of Frontier Physics in Controlled Nuclear Fusion and Institute of Plasma Physics, Chinese Academy of Sciences)

01/10/2026, 12:20

Nonlinear EP physics

Oral

Energetic particles (EPs) from fusion reactions and auxiliary heating can drive symmetry-breaking shear Alfvén wave (SAW) instabilities, including AEs and EPMs, via resonant wave-particle interactions, and understanding their nonlinear evolution is critical for understanding the alpha particle confinement in next-generation devices like ITER and CFEDR.
In our previous work [1], nonlinear...