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