{
  "name": "mac_synthetic_v2",
  "seed": 3407,
  "n_samples": 3400,
  "split": [
    2400,
    400,
    600
  ],
  "grid": [
    1000.0,
    1800.0,
    801
  ],
  "wavelengths_nm": [
    325.0,
    514.0,
    633.0
  ],
  "physics": {
    "C_stage1_514nm_A": 44.0,
    "C_stage2_514nm_A-2": 0.0055,
    "wavelength_scaling": "(wl/514)^2 both stages; turnover La=20A invariant",
    "stress_g_shift_cm-1_per_GPa": 5.0,
    "sigma_max_GPa": 8.0,
    "pl_slope": "linear in h_frac (Casiraghi PRB 72 085401)",
    "d_suppression_with_h": "1 - 0.6*h"
  },
  "provenance": "SYNTHETIC v2 \u2014 v1 + wavelength-scaled C, stress G-shift, a-C:H PL/hydrogen (report.pdf next-steps item 2)"
}