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4.2 Ray equations

In the canonically conjugate systems (ρ,θ,ϕ ) and (kρ,m, n) the ray equations becomes

(39)

and

(40)

For an axisymmetric magnetic configuration, ∂D∕∂ϕ = 0 such that n is an invariant. Therefore, only the first five equations need to be solved. The value of n is determined from launching conditions.

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