GeometryVparMu

The geometry folder contains a helper file geometry.hpp which provides shortcuts to the types needed to define the 2D velocity geometry (vpar,mu).

• Concerning the 3D space, several coordinate systems are used:
• Vpar : the parallel velocity
• Mu : the magnetic momentum (i.e \(\mu = \frac{v_{\perp}^2}{2B}\))
• V2D = (Vpar, Mu)