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)