B Various properties of the coordinates system

 B.1 Alternative calculation of the parallel index of refraction
 B.2 Calculation of kρ, m and/or n as a function of k and k
 B.3 Calculation of kρ, m and n as a function of kR, kZ and kϕ
 B.4 Wave scattering by fluctuations
  B.4.1 Calculation of the scattered wave vector
  B.4.2 Derivation of the wave kinetic equation
  B.4.3 Solution of the wave kinetic equation
 B.5 Calculation of ρ