A vector potential

A amplitude of vector potential in 2D MHD turbulence, Eq.(9.19)

B0 mean magnetic field (§9.2)

Bα,β cross-section of collision (§2.2.3.6)

C (k,ω) velocity-integrated discreteness correlation function, Eq.(2.14)

turbulent collision operator through wave–particle interaction

turbulent collision operator through wave–wave interaction

cs ion sound speed

D diffusion coefficient of quasi-particle in disparate-scale interaction, Eq.(7.35)

di ion collisionless skin depth, c/ωpi

Dk k-space diffusivity, Eq.(5.68)

Dk,ω electric displacement vector, Dk,ω = ∈ (k,ω) Ek,ω

dk,ω rate of test particle scattering in magnetized plasma, Eq.(4.43)

DQL quasi-linear diffusion coefficient

D (ν) fluctuation-induced diffusion (§2.2.3)

DNR (ν) quasi-linear diffusion coefficient for non-resonant particles, Eq.(3.22)

Dνν velocity diffusion of magnetized plasma, Eq.(3.68)

Dv, col collisional diffusion coefficient in velocity space (§8.1.2.3)

Drel (x−) relative diffusion function, Eq.(8.56)

Djj, j = 1, 2 quasi-linear diffusion coefficient at phase space 1 or 2, Eq.(8.47)

D12, D21 resonant correlated diffusion coefficient, Eq.(8.47)