Tabular list for input.cgyro

• Plasma shape/geometry

• Advanced shape parameters

• Control parameters

• Fields

• Numerical Resolution

• Numerical Dissipation

• Time Stepping

• Species-related parameters

• Collisions

• Rotation physics

• Global-spectral parameters

• Output file control

• Optimization related parameters

Plasma shape/geometry

input.cgyro parameter	Short description	Default
EQUILIBRIUM_MODEL	Geometry model selector	2
RMIN	Normalized minor radius	0.5
RMAJ	Normalized major radius	3.0
SHIFT	Shafranov shift	0.0
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
ZMAG	Elevation	0.0
DZMAG	Gradient of elevation	0.0
Q	Safety factor	2.0
S	Magnetic shear	1.0
BTCCW	Field orientation	-1.0
IPCCW	Current orientation	-1.0
UDSYMMETRY_FLAG	Enforce up-down symmetry	1

Advanced shape parameters

input.cgyro parameter	Short description	Default
SHAPE_COS0	Tilt	0.0
SHAPE_S_COS0	Tilt shear	0.0
SHAPE_COS1	Ovality	0.0
SHAPE_S_COS1	Ovality shear	0.0
SHAPE_COS2	2nd antisymmetric moment	0.0
SHAPE_S_COS2	2nd antisymmetric moment shear	0.0
SHAPE_COS3	3rd antisymmetric moment	0.0
SHAPE_S_COS3	3rd antisymmetric moment shear	0.0
SHAPE_SIN3	3rd symmetric moment	0.0
SHAPE_S_SIN3	3rd symmetric moment shear	0.0

Control parameters

input.cgyro parameter	Short description	Default
PROFILE_MODEL	Profile input selector	1
QUASINEUTRAL_FLAG	Toggle quasineutrality	1
NONLINEAR_FLAG	Toggle nonlinear simulation	0
ZF_TEST_MODE	Control zonal flow testing	0
SILENT_FLAG	Toggle silent output	0
AMP	Initial \(n>0\) amplitude	0.1
AMP0	Initial \(n=0\) amplitude	0.0

Fields

input.cgyro parameter	Short description	Default
N_FIELD	Number of fields to evolve	1
BETAE_UNIT	Electron beta	0.0
BETAE_UNIT_SCALE	Electron beta scaling parameter	0.0
BETA_STAR_SCALE	Pressure gradient scaling factor	1.0
LAMBDA_DEBYE	Debye length	0.0
LAMBDA_DEBYE_SCALE	Debye length scaling factor	0.0

Numerical Resolution

input.cgyro parameter	Short description	Default
N_RADIAL	Number of radial \(k_x^0\) wavenumbers	4
BOX_SIZE	Radial domain size	1
N_TOROIDAL	Number of binormal \(k_y\) wavenumbers	1
KY	Binormal wavenumber or domain size	0.3
N_THETA	Number of poloidal \(\theta\) gridpoints	24
N_XI	Number of pitch angle \(\xi\) gridpoints	16
N_ENERGY	Number of energy \(u\) gridpoints	8
E_MAX	Maximum energy	8.0

Numerical Dissipation

input.cgyro parameter	Short description	Default
UP_RADIAL	Radial spectral upwind scaling	1.0
UP_THETA	Poloidal upwind scaling	1.0
UP_ALPHA	Binormal spectral upwind scaling	0.0
NUP_RADIAL	Radial spectral upwind order	3
NUP_THETA	Poloidal upwind order	3
NUP_ALPHA	Binormal spectral upwind order	3
UPWIND_SINGLE_FLAG	Use reduced precision communication	0

Time Stepping

input.cgyro parameter	Short description	Default
DELTA_T_METHOD	Time integrator selection	0
DELTA_T	Time step	0.01
ERROR_TOL	Error tolerance	1e-4
MAX_TIME	Simulation time	1.0
FREQ_TOL	Error tolerance for frequency	0.001
PRINT_STEP	Data output interval	100
RESTART_STEP	Restart data output interval	10

Species-related parameters

input.cgyro parameter	Short description	Default
N_SPECIES	Number of GK species (ions plus electrons)	1
Z_*	Species charge	1
MASS_*	Species mass	1.0
DENS_*	Species density	1.0
TEMP_*	Species temperature	1.0
DLNNDR_*	Species density gradient	1.0
DLNTDR_*	Species temperature gradient	1.0

Collisions

input.cgyro parameter	Short description	Default
NU_EE	Electron-electron collision frequency	0.1
COLLISION_MODEL	Collision model selector	4
COLLISION_FIELD_MODEL	Toggle self-consistent field update	1
COLLISION_MOM_RESTORE	Toggle momentum conservation	1
COLLISION_ENE_RESTORE	Toggle energy conservation	1
COLLISION_ENE_DIFFUSION	Toggle energy diffusion	1
COLLISION_KPERP	Toggle so-called FLR term	0
COLLISION_PRECISION_MODE	Reduce Sugama memory use	0

Rotation physics

input.cgyro parameter	Short description	Default
ROTATION_MODEL	Rotation model selector	1
GAMMA_E	Dopper shearing rate (\(E \times B\) shear)	0.0
GAMMA_P	Rotation shearing rate	0.0
MACH	Rotation speed (Mach number)	0.0
GAMMA_E_SCALE	Doppler shearing rate scaling factor	1.0
GAMMA_P_SCALE	Rotation shearing rate scaling factor	1.0
MACH_SCALE	Rotation speed scaling factor	1.0

Global-spectral parameters

input.cgyro parameter	Short description	Default
N_GLOBAL	Global output resolution	4
NU_GLOBAL	Source rate	15.0

Output file control

input.cgyro parameter	Short description	Default
FIELD_PRINT_FLAG	Output of electromagnetic field components	0
MOMENT_PRINT_FLAG	Output of density and energy moments	0
GFLUX_PRINT_FLAG	Output of global flux profiles	0
H_PRINT_FLAG	Output of distribution (single-mode only)	0

Optimization related parameters

input.cgyro parameter	Short description	Default
TOROIDALS_PER_PROC	How many toroidal harmonics per MPI process	1
MPI_RANK_ORDER	Relative ordering of MPI ranks	2
VELOCITY_ORDER	What internal velocity order to use	1
GPU_BIGMEM_FLAG	Enable GPU offload when possible	1