Source Diagnostics

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

Distribution-function source diagnostics and neutral-particle source outputs.

xgc.fsourcediag.*.bp

Variable	Units	Description
fullname	[m^3, 1/m^3, dimensionless, J, kg m/s]	Per-node f0_df diagnostic [species]_[channel]_[source]; channel is volume, density, density_change, energy_change, or momentum_change for the named source. Change channels are normalized by the source density/weight sum, so the actual density, momentum, and energy changes are obtained by multiplying by the corresponding density variable. The source [total] is a special case whose meaning depends on f0_df0g_transfer_algorithm. For PersistentRetainedDf0g, [total] is the conservation error from dropping distribution-function components that could not be interpolated to particles. For LegacyAddToF0gH, [total] is the remainder of the mesh-to-particle transfer and is added to the background distribution function; in that case, the sum of [total] and [total2] should equal the sum of the other sources.
fullname	[m^3, 1/m^3, dimensionless, J, kg m/s]	Per-node particle-based f0_df diagnostic [species]_[channel]_total2; change channels give net particle density, energy, and parallel-momentum changes normalized by the total source density/weight sum. This output represents the density/momentum/energy changes in the particle population due to sources after mesh-to-particle interpolation.
psi	T m^2	Poloidal magnetic flux \(\psi/(2\pi)\).
psi_mks	Wb/rad	Poloidal magnetic flux \(\psi/(2\pi)\) in MKS units.
samples	Positive integer	Output size (number of mesh vertices).
step	Positive integer	Simulation time step index.
time	s	Simulation time of step in seconds.
tindex	Positive integer	Index of the output time slice (simulation time step/output frequency)

xgc.neutrals.*.bp

Variable	Units	Description
den_neut	m^-3	Neutrals density.
n_n	Positive integer	Number of mesh nodes per plane.
rel_std	dimensionless	Relative statistical uncertainty of the neutral background density on mesh nodes.
temp_neut	eV	Neutrals temperature.