Naming convention used in PLEQUE

Coordinates

Here presented naming convention is used to read/create input/output dict/xarray files.

• 2D

  • R (default): Radial cylindrical coordinates with zero on machine axis

  • Z (default): Vertical coordinate with zero on machine geometrical axis

• 1D

  • psi_n (default): Normalized poloidal magnetic flux with zero on magnetic axis and one on the last closed flux surface

    \(\psi_\mathrm{N} = \frac{\psi - \psi_\text{ax}}{\psi_\text{LCFS} - \psi_\text{ax}}\)

  • Fallowing input options are not implemented yet.

  • rho: \(\rho = \sqrt{\psi_\text{N}}\)

  • psi_1dprof - poloidal magnetic flux; this coordinate axis is used only if psi_n is not found on the input. Output files uses implicitly psi_n axis.

2D profiles

• Required on the input

  • psi (Wb): poloidal magnetic flux

• Calculated

  • B_R (T): \(R\) component of the magnetic field.

  • B_Z (T): \(Z\) component of the magnetic field.

  • B_pol (T): Poloidal component of the magnetic field. \(B_\theta =\text{sign\,} (I_p) \sqrt{B_R^2 + B_Z^2}\) Todo resolve the sign of B_pol and implement it!!!

  • B_tor (T): Toroidal component of the magnetic field.

  • B_abs (T): Absolute value of the magnetic field.

  • j_R (A/m2): \(R\) component of the current density. todo: Check the current unit

  • j_Z (A/m2): \(Z\) component of the current density.

  • j_pol (A/m2): Poloidal component of the current density.

  • j_tor (A/m2): Toroidal component of the current density.

  • j_abs (A/m2): Asolute value of the current density.

1D profiles

• Required on the input

  • pressure (Pa)

  • pprime (Pa/Wb)

  • F: \(F = R B_\phi\)

• Calculated

  • pprime: \(p \partial_\psi\)

  • Fprime: \(F' = \partial_\psi F\)

  • FFprime: \(FF' = F \partial_\psi F\)

  • fprime: \(f' = \partial_\psi f\)

  • f: \(f = (1/\mu_0) R B_\phi\)

  • ffprime: \(ff' = f \partial_\psi f\)

  • rho, psi_n

• Deriver

  • q: safety factor profile

  • qprime\(q' = \partial_\psi q\)

  • Not yet implemented:

    • magnetic_shear

    • …

Attributes

• To be written.

FluxSurface quantities