Consider an equilibrium magnetic fluxsurface whose label is .
Let

(A.8) 
where
, and is the equilibrium magnetic field. Here, , , , , , and are specified in Sections 14.2 and 14.4.
It is helpful to define a new poloidal angle
such that

(A.9) 
Let


(A.10) 


(A.11) 


(A.12) 


(A.13) 


(A.14) 


(A.15) 
where the integrals are taken at constant ,
is the maximum value of on the magnetic
fluxsurface, and a positive integer.
The species transit frequency is written [7]

(A.16) 
where

(A.17) 
and

(A.18) 
Here, is the
species mass, and the species temperature (in energy units). The fraction of passing particles
is [7]

(A.19) 
[See Equation (2.200).]
Finally, the dimensionless species collisionality parameter [see Equation (2.95)].
is written [7]

(A.20) 
where
[See Equation (2.190).]
Here, the Coulomb logarithm,
[1], is assumed to take the same large constant value (i.e.,
),
independent of species.