2017/03/10 by Y. Kosuga, S.-I. Itoh, S.‐I. Itoh +5 · 9 citations
Materials Science · Physics and Astronomy · #Classical mechanics #Computational physics #Computer science #Fusion materials and technologies #Laser-Plasma Interactions and Diagnostics #Magnetic confinement fusion research #Mechanics #Phase (matter) #Phase space #Physics #Space (punctuation) #Statistical physics #Turbulence #Wave turbulence
paper · pdf · doi:10.1088/1741-4326/57/7/072006
published in Nuclear Fusion 57(7), 072006 (IOP Publishing)
openalex publication_date 2017/03/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/08
In fusion plasmas, several mechanisms such as heating, wave-particle interaction etc can drive deviations of distribution function from Maxwelian to form phase space structures. This article discusses the impact of phase space structures in drift wave turbulence on dynamics and transport modeling. The two cases of (i) coherent holes and (ii) incoherent granulations (clusters of correlated resonant particles with finite life time) are treated. Their dynamical impact on driving subcritical instability is analyzed by explicitly calculating the nonlinear growth rate. The role of zonal flows is also addressed. It is explained how phase space structures can be related to transient events and non-diffusive transport, issues in current confinement research.