Parameters for input.neo

Some features of input.neo to note:

• Parameters not specified in input.neo are filled in by default. Default values are shown in the parameter definitions.

• The ordering of parameters is arbitrary.

• Lines beginning with # are comments.

• No spaces on the left or right of the equal symbol (\(=\)) are allowed.

• Parameters with a _MODEL specifier should normally take non-negative integer values.

Numerical resolution

input.neo parameter	Short description	Default
N_RADIAL	Number of radial gridpoints	1
N_THETA	Number of poloidal gridpoints	17
N_XI	Number of \(\xi\) polynomials - 1	17
N_ENERGY	Number of \({\rm v}\) polynomials - 1	6

Plasma equilibrium/geometry

input.neo parameter	Short description	Default
EQUILIBRIUM_MODEL	Geometry selector	0
RMIN_OVER_A	Normalized minor radius (min)	0.5
RMIN_OVER_A_2	Normalized minor radius (max)	0.6
RMAJ_OVER_A	Normalized major radius	3.0
KAPPA	Elongation	1.0
S_KAPPA	Elongation shear	0.0
DELTA	Triangularity	0.0
S_DELTA	Triangularity shear	0.0
ZETA	Squareness	0.0
S_ZETA	Squareness shear	0.0
SHIFT	Shafranov shift	0.0
ZMAG_OVER_A	Normalized elevation	0.0
S_ZMAG	Gradient of elevation	0.0
Q	Safety factor	2.0
SHEAR	Magnetic shear	1.0
BETA_STAR	Effective pressure gradient	0.0
IPCCW	Determines the sign of the plasma current	-1
BTCCW	Determines the sign of the toroidal field	-1
RHO_STAR	Normalized Larmor radius	0.001
DPHI0DR	Normalized radial electric field	0.0
EPAR0	Normalized inductive electric field	0.0
EPAR0_SPITZER	Normalized inductive electric field for spitzer problem	1.0

General models

input.neo parameter	Short description	Default
SILENT_FLAG	Output mode selector	0
SIM_MODEL	Numerical/analytic simulation model selector	2
SPITZER_MODEL	DKE/Spitzer problem selector	0
COLLISION_MODEL	Collision model selector	4

Profile models

input.neo parameter	Short description	Default
PROFILE_MODEL	Local/experimental profile selector	1
PROFILE_EQUILIBRIUM_MODEL	Geometry selector for experimental profiles	1
PROFILE_ERAD0_MODEL	Determines whether to include \(E_r^{(0)}\) in experimental profiles	1

Rotation physics

input.neo parameter	Short description	Default
ROTATION_MODEL	Rotation model selector	1
OMEGA_ROT	Normalized toroidal angular frequency	0.0
OMEGA_ROT_DERIV	Normalized toroidal rotation shear	0.0

Nonaxisymmetric effects

input.neo parameter	Short description	Default
THREED_MODEL	3D model selector	0
THREED_EXB_MODEL	3D ExB drift velocity model selector (higher-order)	0
THREED_EXB_DPHI0DR	Normalized radial electric field in the 3D ExB drift velocity	0

Species-dependent parameters

input.neo parameter	Short description	Default
N_SPECIES	Number of kinetic species	1
Z_*	Charge of Species *	1
MASS_*	Normalized mass of Species *	1.0
DENS_*	Normalized density of Species *	{1.0,0,0,0,0,0,0,0,0,0,0}
TEMP_*	Normalized temperature of Species *	1.0
DLNNDR_*	Normalized logarithmic density gradient of Species *	1.0
DLNTDR_*	Normalized logarithmic temperature of Species *	1.0
PROFILE_DLNNDR_*_SCALE	Scaling factor for profile normalized logarithmic density gradient of Species *	1.0
PROFILE_DLNTDR_*_SCALE	Scaling factor for profile normalized logarithmic temperature gradient of Species *	1.0
ANISO_MODEL_*	Anisotropic temperaure model for Species *	1
TEMP_PARA_*	Normalized parallel temperature (aniso) of Species *	1
DLNTDR_PARA_*	Normalized logarithmic parallel temperature (aniso) of Species *	1
TEMP_PERP_*	Normalized perpendicular temperature (aniso) of Species *	1
DLNTDR_PERP_*	Normalized logarithmic perpendicular temperature (aniso) of Species *	1
NU_1	Normalized collision frequency of Species 1	0.1
NE_ADE	Normalized density of adiabatic electrons	1.0
TE_ADE	Normalized temperature of adiabatic electrons	1.0
DLNNDRE_ADE	Normalized logarithmic density gradient of adiabatic electrons	1.0
DLNTDRE_ADE	Normalized logarithmic temperature of adiabatic electrons	1.0

Extra subroutine interface parameters

These parameters are available only via the subroutine interface, i.e. not in input.neo.

input.neo parameter	Short description	Default
GEO_NY	Number of geometry Fourier coefficients	0
GEO_YIN	Array of normalized geometry Fourier coefficients	0.0