Source And Transport Profile Outputs

This page is generated from in-code XGC I/O metadata by utils/python/document_outputs.py.

Source, current-drive, collision-convergence, loop-voltage, and transport-profile diagnostic outputs.

xgc.col_conv_status.bp

Variable	Units	Description
`convergence_status`	integer flag	Collision solver convergence status at each toroidal plane and mesh node. Status codes are -5: NaN or Inf found, -4: maximum Picard iterations reached, -3: too many negative distribution-function values after the solve, -2: positivity correction failed, -1: conservation check failed before the first Picard solve, 0: not attempted, 1: converged successfully, 2: still in progress/internal transient state.
`n_subcycles`	Non-negative integer	Number of collision subcycles used at each toroidal plane and mesh node.

Variable	Units	Description
`jpar_bg`	A m^-2	Equilibrium parallel current density \(j_{\parallel}=\hat{b}\cdot(\nabla\times B)/\mu_0\) on mesh nodes.
`jpar_bg_fs_avg`	A m^-2	Flux-surface-averaged equilibrium parallel current density on mesh nodes.
`n_n`	Positive integer	Number of mesh nodes per plane.

Variable	Units	Description
`density`	m^-3	Flux-surface-averaged density profiles on [species, sample, flux surface].
`flow`	m s^-1	Flux-surface-averaged parallel-flow profiles on [species, sample, flux surface].
`n_samples`	Positive integer	Number of buffered time samples in each diffusion-profile diagnostic output.
`n_species`	Positive integer	Number of non-adiabatic species in the diffusion-profile diagnostic.
`n_surf`	Positive integer	Number of flux-surface grid points in the diffusion-profile diagnostic.
`psi`	T m^2	Poloidal magnetic flux \(\psi/(2\pi)\).
`steps`	Non-negative integer	Simulation time steps corresponding to buffered diffusion-profile samples.
`temp`	eV	Flux-surface-averaged temperature profiles on [species, sample, flux surface].
`time`	s	Simulation time of step in seconds.

Variable	Units	Description
`jpara_diff_current`	A m^-2	Current difference between the XGC parallel plasma current density and the MHD-equilibrium parallel current density.
`jpara_diff_integral`	A m^-2	Cumulative controller sum of the difference between the XGC parallel plasma current density and the MHD-equilibrium parallel current density.
`jpara_diff_previous`	A m^-2	Smoothed previous difference between the XGC parallel plasma current density and the MHD-equilibrium parallel current density.
`loop_voltage`	V	Loop voltage. The corresponding toroidal electric field is \(E_{\phi}=V_{\mathrm{loop}}/(2\pi R)\), so positive loop voltage implies an electric field in the positive toroidal direction.
`step`	Positive integer	Simulation time step index.
`time`	s	Simulation time of step in seconds.