# Define the system of units to use internally. 
InternalUnitSystem:
  UnitMass_in_cgs:     2.0e33     # Solar masses
  UnitLength_in_cgs:   3.0857e21  # Kiloparsecs
  UnitVelocity_in_cgs: 1.0e5      # Kilometers per second
  UnitCurrent_in_cgs:  1          # Amperes
  UnitTemp_in_cgs:     1          # Kelvin

# Parameters governing the time integration
TimeIntegration:
  time_begin: 0.    # The starting time of the simulation (in internal units).
  time_end:   0.25  # The end time of the simulation (in internal units).
  dt_min:     1e-5  # The minimal time-step size of the simulation (in internal units).
  dt_max:     1e-2  # The maximal time-step size of the simulation (in internal units).

# Parameters governing the snapshots
Snapshots:
  basename:            coolingBox # Common part of the name of output files
  time_first:          0.         # Time of the first output (in internal units)
  delta_time:          1e-2       # Time difference between consecutive outputs (in internal units)

# Parameters governing the conserved quantities statistics
Statistics:
  delta_time:          1e-3 # Time between statistics output

Scheduler:
  tasks_per_cell: 64

# Parameters for the hydrodynamics scheme
SPH:
  resolution_eta:        1.2348   # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
  CFL_condition:         0.1      # Courant-Friedrich-Levy condition for time integration.
  minimal_temperature: 100.       # Kelvin
  
# Parameters related to the initial conditions
InitialConditions:
  file_name:  ./coolingBox.hdf5     # The file to read
  periodic:   1
  
# Dimensionless pre-factor for the time-step condition
LambdaCooling:
  lambda_nH2_cgs:              1e-22 # Cooling rate divided by square Hydrogen number density (in cgs units [erg * s^-1 * cm^3])
  cooling_tstep_mult:          1.0        # Dimensionless pre-factor for the time-step condition

# Cooling with Grackle 3.0
GrackleCooling:
  cloudy_table: CloudyData_UVB=HM2012.h5       # Name of the Cloudy Table (available on the grackle bitbucket repository)
  with_UV_background: 0                        # Enable or not the UV background
  redshift: 0                                  # Redshift to use (-1 means time based redshift)
  with_metal_cooling: 1                        # Enable or not the metal cooling
  provide_volumetric_heating_rates: 0          # (optional) User provide volumetric heating rates
  provide_specific_heating_rates: 0            # (optional) User provide specific heating rates
  max_steps: 10000                             # (optional) Max number of step when computing the initial composition
  convergence_limit: 1e-2                      # (optional) Convergence threshold (relative) for initial composition
  thermal_time_myr: 5                          # (optional) Time (in Myr) for adiabatic cooling after a feedback event.
  self_shielding_method: 0                    # (optional) Grackle (1->3 for Grackle's ones, 0 for none and -1 for GEAR)
  self_shielding_threshold_atom_per_cm3: 0.007 # Required only with GEAR's self shielding. Density threshold of the self shielding
  maximal_density_Hpcm3: -1                    # Maximal density (in hydrogen atoms/cm^3) for cooling. Higher densities are floored to this value to ensure grackle works properly when interpolating beyond the cloudy_table maximal density. A value < 0 deactivates this parameter.

GEARChemistry:
  initial_metallicity: 0.01295

EAGLECooling:
  dir_name:                ./coolingtables/
  H_reion_z:               11.5
  H_reion_eV_p_H:          2.0
  He_reion_z_centre:       3.5
  He_reion_z_sigma:        0.5
  He_reion_eV_p_H:         2.0

EAGLEChemistry:             # Solar abundances
  init_abundance_metal:     0.014
  init_abundance_Hydrogen:  0.70649785
  init_abundance_Helium:    0.28055534
  init_abundance_Carbon:    2.0665436e-3
  init_abundance_Nitrogen:  8.3562563e-4
  init_abundance_Oxygen:    5.4926244e-3
  init_abundance_Neon:      1.4144605e-3
  init_abundance_Magnesium: 5.907064e-4
  init_abundance_Silicon:   6.825874e-4
  init_abundance_Iron:      1.1032152e-3

GEARPressureFloor:
  jeans_factor: 0.       # Number of particles required to suppose a resolved clump and avoid the pressure floor.

PS2020Cooling:
  dir_name:                ./UV_dust1_CR1_G1_shield1.hdf5 # Location of the cooling tables
  H_reion_z:               7.5               # Redshift of Hydrogen re-ionization (Planck 2018)
  H_reion_eV_p_H:          2.0
  He_reion_z_centre:       3.5               # Redshift of the centre of the Helium re-ionization Gaussian
  He_reion_z_sigma:        0.5               # Spread in redshift of the  Helium re-ionization Gaussian
  He_reion_eV_p_H:         2.0               # Energy inject by Helium re-ionization in electron-volt per Hydrogen atom
  delta_logTEOS_subgrid_properties: 0.3      # delta log T above the EOS below which the subgrid properties use Teq assumption
  rapid_cooling_threshold:          0.333333 # Switch to rapid cooling regime for dt / t_cool above this threshold.