Equilibrium and boundary

There are four output files containing magnetic equilibrium and boundary parameters: xgc.bfield.bp, xgc.bfieldm.bp, xgc.bounce.bp and xgc.equil.bp.

For the name of the output variable, replace [species] with one of the following: e_, i_, i2, i3, i4, i5, i6.

xgc.bfield.bp
Printed when: always.   Output frequency: once at start/restart.

This file is for the magnetic field information at the node points of the 3D mesh.

Output	Dimension	Units	Description
bfield	# poloidal planes * \(\times\) 3 \(\times\) # planar mesh nodes	T	Magnetic field vector \((B_R,B_Z,B_phi)\) on the mesh nodes
jpar_bg	# poloidal planes * \(\times\) # planar mesh nodes		Equilibrium current \(j_{\parallel} = \hat{\mathbf{b}} \cdot (\nabla \times \mathbf{B}) / \mu_{0}\)
jpar_bg_fs_avg	# flux surfaces		Flux-surface average of jpar_bg.
n_n	Scalar	Positive integer	Number of mesh nodes per plane.
psi	# planar mesh nodes	\(\mathrm{T m^2}\)	Poloidal magnetic flux \(\psi\) (over \(2 \pi\))

xgc.bfieldm.bp
Printed when: always   Output frequency: once at start/restart.

This file is for the magnetic field at the midplane.

Output	Dimension	Units	Description
N	Scalar	Positive integer	# of midplane points (1000)
abs_bphi	# of midplane points	T	Absolute value of toroidal magnetic field
dpdr	# of midplane points	Tm	\(\frac{d\psi}{dr}\)
psi_n	# of midplane points	Normalized	Normalized poloidal magnetic flux by X-point value
rmajor	# of midplane points	m	Major radius
z	Scalar	m	Z(height) at the magnetic axis

xgc.equil.bp
Printed when: always.   Output frequency: once at start/restart.

Output	Dimension	Units	Description
eq_I	eq_mpsi	Tm	\(B_{tor} R\) as a function of flux label. Poloidal current function in EFIT
eq_axis_b	Scalar	T	Magnetic field at the magnetic axis
eq_axis_r	Scalar	m	Major radius at the magnetic axis
eq_axis_z	Scalar	m	Z(height) at the magnetic axis
[species]eq_dens_path	Scalar		A path constructed from input variables sml_input_file_dir and eq_dens_file
eq_max_r	Scalar	m	Maximum major radius of interpolation boundary
eq_max_z	Scalar	m	Maximum height of interpolation boundary
eq_min_r	Scalar	m	Minimum major radius of interpolation boundary
eq_min_z	Scalar	m	Minimum height of interpolation boundary
eq_mpsi	Scalar		Number of psi (poloidal flux/flux label) grid points
eq_mr	Scalar		Number of horizontal R grid points
eq_mz	Scalar		Number of vertical Z grid points
eq_psi_grid	eq_mpsi	\(Tm^2\)	Poloidal flux on the \(\psi\) grid points
eq_psi_rz	eq_mz \(\times\) eq_mr	\(Tm^2\)	Poloidal flux on the rectangular grid points
[species]eq_temp_path	Scalar		A path constructed from input variables sml_input_file_dir and eq_temp_file
eq_x_psi	Scalar	\(Tm^2\)	Description
eq_x_r	Scalar	m	Major radius at the first (lower) X-point
eq_x_z	Scalar	m	Height at the first (lower) X-point

xgc.rmp_deltaa.bp/xgc.rmp_deltab.bp
Printed when: ?   Output frequency: ?

These files are for RMP simulations (with field data from M3D-C1 file).

Output	Dimension	Units	Description
n_coord	Scalar	Positive integer
n_n nnode	Scalar	Positive integer	Number of mesh nodes per plane.
n_phi	Scalar	Positive integer	Number of poloidal planes \(N_{\mathrm{planes}}\).
n_r
n_z
num_ntor	Scalar	Positive integer	Number of toroidal mode numbers for RMP simulations (1+ptb_3db_num_ntor).
ntor
deltaa
deltaa_re
deltaa_im
deltab_re
deltab_im

* Dimension only for stellarator simulations.