It is assumed that profile information exists on a grid from
0 to **jmaxm** when the model is called. Gradients are computed
with respect to the normalized square root of the toroidal flux
with where is the toroidal flux,
*B*_{T} is the toroidal field, and *a* is the minor radius.
For every unstable root in the *k*_{y} spectrum, the quasi-linear
diffusivities are derived summing over the individual contributions.
The effective transport coefficients are in units
of *m*^{2}/*s* and are defined assuming that the the transport equations
take the form prescribed by the ITER Expert Group,

Here, is the effective diffusivity and no distinction is
made between convection and conduction.

The toroidal momentum is defined with the
momentum diffusion equation given as

Thu Feb 20 11:20:39 EST 2003