{
  "schema": "ac13-parker-benchmarks-2026-10-28-v1",
  "kind": "authored synthetic boundary-condition examples; no observed planetary profiles",
  "conventions": {
    "radius": "meters from planet center; lower boundary is a fixed reservoir, not measured transit radius",
    "velocity": "outward m/s; constant single-component mean particle mass",
    "temperature": "prescribed kelvin, independent of XUV irradiance",
    "density": "number/m3 at lower boundary; cross-section is adopted constant teaching value",
    "xuv": "W/m2 at planet; absorbed power eta*pi*Rbase^2*F, no ionization/radiative transfer",
    "knudsen": "hard-sphere mfp1/(sqrt(2)*n*sigma), local density-gradient length for wind; local pressure scale height for hydrostatic exobase",
    "scope": "Jeans limit, isothermal Parker transport and energy-limited scale are separate; no smooth efficiency blend or lifetime evolution"
  },
  "constants": {
    "boltzmann_j_per_k": 1.380649e-23,
    "particle_mass_kg": 1.6735e-27,
    "earth_gm_m3_s2": 398600441800000.0,
    "earth_radius_m": 6371000,
    "collision_cross_section_m2": 2e-19,
    "outer_radius_ratio": 12
  },
  "cases": [
    {
      "name": "wind",
      "settings": {
        "planetMassEarth": 4,
        "temperatureKelvin": 4000,
        "logXuvFlux": 2,
        "baseRadiusEarth": 2,
        "logBaseNumberDensity": 15,
        "heatingEfficiency": 0.15
      }
    },
    {
      "name": "tail",
      "settings": {
        "planetMassEarth": 8,
        "temperatureKelvin": 1000,
        "logXuvFlux": 0,
        "baseRadiusEarth": 2,
        "logBaseNumberDensity": 15,
        "heatingEfficiency": 0.15
      }
    },
    {
      "name": "thin",
      "settings": {
        "planetMassEarth": 8,
        "temperatureKelvin": 3000,
        "logXuvFlux": 1,
        "baseRadiusEarth": 2,
        "logBaseNumberDensity": 13,
        "heatingEfficiency": 0.15
      }
    },
    {
      "name": "shortfall",
      "settings": {
        "planetMassEarth": 4,
        "temperatureKelvin": 6000,
        "logXuvFlux": -1,
        "baseRadiusEarth": 2,
        "logBaseNumberDensity": 15,
        "heatingEfficiency": 0.15
      }
    },
    {
      "name": "buried",
      "settings": {
        "planetMassEarth": 1,
        "temperatureKelvin": 9000,
        "logXuvFlux": 2,
        "baseRadiusEarth": 2,
        "logBaseNumberDensity": 15,
        "heatingEfficiency": 0.15
      }
    }
  ]
}