# Ultrafast electron cooling in an expanding ultracold plasma
# T. Kroker et al., Nat. Commun. 12, 596 (2021)
# https://doi.org/10.1038/s41467-020-20815-8

Particles:
    - Species:
        name: e
        number_density: 2.0e+20                        # /m^3
        mass: 9.1093837015e-31                         # kg, electron mass
        num: 4000                                      # total number of electrons
        Z: -1.0                                        # degree of ionization
        temperature: 5250                              # K, initial electron temperature
        initial_velocity_distribution: monochromatic   # monochromatic electrons with random velocity vectors

    - Species:
        name: Rb
        number_density: 2.0e+20                        # /m^3
        atomic_weight: 87                              # Rubidium-87 isotope
        num: 4000                                      # total number of particles of ion1
        Z: 1.0                                         # degree of ionization
        temperature: 0.033                             # K, initial ion temperature due to ionization recoil

Potential:
    type: Coulomb                     # potential type
    method: PP
    rc: 100.0e-6                      # cut-off radius, m
    a_rs: 20.0e-9                       # short-range cutoff

Integrator:
    type: verlet
    dt: 50.0e-15                      # sec
    equilibration_steps: 0
    eq_dump_step: 10
    production_steps: 600
    prod_dump_step: 4

Thermostat:
    type: Berendsen                   #  thermostat type
    relaxation_timestep: 0
    berendsen_tau: 5.0

Parameters:
    units: mks                        # SI units
    load_method: random_no_reject
    boundary_conditions: absorbing    # absorbing boundary conditions
    Lx: 200.0e-6                      # size of extended simulation box
    Ly: 200.0e-6
    Lz: 200.0e-6
    np_per_side: [16.0, 16.0, 31.25]  # elongated initial particle distribution

IO:
    verbose: True
    job_dir: UEC_4000

Observables:
  - Thermodynamics:
      phase: production