{
  "schema_version": 1,
  "case": "boundary-reflection",
  "title": "Let a pulse leave, or reflect it back",
  "media_kind": "time-domain-fdtd-snapshots",
  "core_source_commit": "a9054338616b91bb1364699882c2530fa29a0048",
  "generator": "examples/visualization/field_movies.py",
  "generator_sha256": "6fb84e6c675540b332e9f65ba367e8c21295957c776741fe8058953df8a2c293",
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    "jax": "0.6.2",
    "numpy": "1.26.4",
    "backend": "cpu"
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  "evidence_status": "qualitative single-mesh teaching example",
  "limits": [
    "No mesh-refinement or run-length accuracy claim",
    "No measured reflection, transmission, absorption, resonance frequency, or Q",
    "2D TMz model; this is not a finite-height 3D device",
    "CPML is a finite numerical absorber and may reflect residual fields"
  ],
  "runs": [
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      "boundary": "cpml",
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        0.001
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      "realized_display_span_m": {
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        "f0_Hz": 6000000000.0,
        "bandwidth": 0.8,
        "amplitude_A": 1e-08,
        "amplitude_kind": "current",
        "waveform": "GaussianPulse",
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      "snapshot_slice_coord_m": 0.0005,
      "snapshot_dims": [
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        "x",
        "y"
      ],
      "preflight_stdout": "  [PREFLIGHT] All checks passed.\n",
      "preflight_codes": []
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    {
      "variant": "pec",
      "boundary": "pec",
      "domain_m": [
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      "realized_display_span_m": {
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        "y": [
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      },
      "mode": "2d_tmz",
      "dx_m": 0.001,
      "dt_s": 2.335067793382187e-12,
      "allocated_grid_shape": [
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        61,
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      "n_steps": 640,
      "snapshot_interval": 4,
      "source": {
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        "component": "ez",
        "f0_Hz": 6000000000.0,
        "bandwidth": 0.8,
        "amplitude_A": 1e-08,
        "amplitude_kind": "current",
        "waveform": "GaussianPulse",
        "cutoff": 3.0
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      "probe_position_m": [
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      "snapshot_slice_coord_m": 0.0005,
      "snapshot_dims": [
        "frame",
        "x",
        "y"
      ],
      "preflight_stdout": "  [PREFLIGHT] All checks passed.\n",
      "preflight_codes": []
    }
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  "display": {
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    "normalization_V_per_m": 0.16679121553897858,
    "scale": "linear -1 to +1 shared across all frames and variants",
    "normalization_excludes_source_radius_m": 0.004,
    "source_pixels_may_saturate": true,
    "fps": 15,
    "frame_count": 160,
    "poster_frame_index": 32,
    "poster_time_s": 3.082289487264487e-10,
    "frame_interpolation": false
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  "artifacts": [
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  "download": {
    "snapshot_frame_stride": 16,
    "description": "Every 16th actual movie frame, full spatial resolution; all probe samples",
    "full_arrays": "Regenerate with the script; full arrays remain in --output"
  }
}