General Comments

Grids

ETS uses two types of grids for the toroidal flux coordinate, not normalized $\rho$ and normalized $x$ , which are defined as:

$\rho = \sqrt{\frac{\Phi}{\pi B_{0}}}\ [\si{m}];$

$\Phi\ [\si{Wb}]$ is the toroidal flux and $B_{0}\ [\si{T}]$ is the magnetic field measured at the characteristic major radius of the device $R_{0}\ [\si{m}]$ ;

$x = \frac{\rho}{\rho_{b}}\ [\si{{-}}]$ , where $\rho_{b}$ is the coordinate of plasma magnetic boundary.

$\frac{\partial}{\partial\rho} = \frac{\partial}{\partial x}\frac{\partial x}{\partial\rho} = \frac{1}{\rho_{b}}\frac{\partial}{\partial x}$

All interfaces between different modules and subroutines use $\rho$ as the primary coordinate, internally, transport equations are solved using $x$ coordinate.

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Table of Contents

General Comments

Grids