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 |
|
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 |
|---|---|---|---|
bp_sign |
Scalar |
Normalized |
Direction of poloidal field (1 or -1). Positive direction is negative Z-direction on the inboard side of the torus. |
bt_sign |
Scalar |
Normalized |
Direction of toroidal field (1 or -1). Positive direction is counter-clockwise looking on the torus from above. |
eq_B_R_rz |
# poloidal planes *
\(\times\) eq_mz
\(\times\) eq_mr
|
\(T\) |
Radial magnetic field component on the rectangular grid points (only written for stellarator simulations). |
eq_B_Z_rz |
# poloidal planes *
\(\times\) eq_mz
\(\times\) eq_mr
|
\(T\) |
Z magnetic field component on the rectangular grid points (only written for stellarator simulations). |
eq_B_phi_rz |
# poloidal planes *
\(\times\) eq_mz
\(\times\) eq_mr
|
\(T\) |
Toroidal magnetic field component on the rectangular grid points (only written for stellarator simulations). |
eq_PEST_angle_rz |
# poloidal planes *
\(\times\) eq_mz
\(\times\) eq_mr
|
Radians |
PEST coordinate on the rectangular grid points (only written for stellarator simulations). |
eq_VMEC_angle_rz |
# poloidal planes *
\(\times\) eq_mz
\(\times\) eq_mr
|
Radians |
VMEC coordinate on the rectangular grid points (only written for stellarator simulations). |
eq_I |
eq_mpsi |
Tm |
\(B_{tor} R\) as a function of flux label. Poloidal current function in EFIT (not written for stellarator simulations). |
eq_axis_b |
# poloidal planes *
\(\times\) 1
|
T |
Magnetic field at the magnetic axis. |
eq_axis_r |
# poloidal planes *
\(\times\) 1
|
m |
Major radius at the magnetic axis. |
eq_axis_z |
# poloidal planes *
\(\times\) 1
|
m |
Z (height) at the magnetic axis. |
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_mp |
Scalar |
Positive integer |
Number of planes in input grid (only written for stellarator simulations). Note that this is not the same as |
eq_mpsi |
Scalar |
Positive integer |
Number of psi (poloidal flux/flux label) grid points. |
eq_mr |
Scalar |
Positive integer |
Number of horizontal R grid points. |
eq_mz |
Scalar |
Positive integer |
Number of vertical Z grid points. |
eq_psi_grid |
eq_mpsi |
\(Tm^2\) |
Poloidal flux on the \(\psi\) grid points. |
psi_norm |
Scalar |
\(Tm^2\) |
Poloidal flux used for normalization. |
eq_psi_rz |
# poloidal planes *
\(\times\) eq_mz
\(\times\) eq_mr
|
\(Tm^2\) |
Poloidal flux on the rectangular grid points. |
eq_x_psi |
# poloidal planes *
\(\times\) 1
|
\(Tm^2\) |
Poloidal flux at the first (lower) X-point. |
eq_x_r |
# poloidal planes *
\(\times\) 1
|
m |
Major radius at the first (lower) X-point. |
eq_x_z |
# poloidal planes *
\(\times\) 1
|
m |
Height at the first (lower) X-point. |
nphi |
Scalar |
Positive integer |
Number of poloidal planes \(N_{\mathrm{planes}}\) (only written for stellarator simulations). |
periodicity |
Scalar |
Positive integer |
Toroidal periodicity from the VMEC file or torus wedge number for a tokamak (only written for stellarator simulations). |
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.