{
 "schema": "optcoil-coupled-conductor/v4",
 "id": "oc-014",
 "provenance": "OC-014 Phase-2 parity fixture: OC-004 geometry and sampling plan re-pointed at the modelext dataset with limits.self_field_correction=critical_state_strip, so the frozen reference exercises the perpendicular-sector floor bound. Synthetic geometry; not a physical design study.",
 "geometry_data_class": "synthetic",
 "pack": {
  "straight_half_length_m": 0.3,
  "bend_radius_m": 0.2,
  "radial_width_m": 0.02,
  "axial_height_m": 0.036
 },
 "winding": {
  "tape_width_m": 0.012,
  "tape_normal": "radial",
  "turns_along_normal": 20,
  "tapes_along_width": 3
 },
 "operating": {
  "temperature_k": 21.0,
  "current_candidates_a": [
   870.0
  ],
  "electric_field_criterion_v_per_m": 0.0001
 },
 "material": {
  "dataset_id": "robinson-superpower-ap-v3-modelext",
  "csv_sha256": "2d8262e4071f995eb239594c5dbc4cd0faffb0426eb2cec66d5ef9240cfe9ede",
  "method": "measured-coordinate-tetrahedral-log-field-log-ic/v1",
  "angle_mapping": "period_180_field_reversal",
  "mirror_policy": "minimum_of_mirror_pair",
  "field_basis_mapping": "pack_field_as_applied_field_self_field_consistent",
  "field_magnitude_policy": "total_magnitude_with_transverse_angle",
  "low_field_policy": "monotone_field_lower_bound",
  "low_field_clamp_t": 0.0501,
  "monotonicity_tolerance": 0.002
 },
 "sampling": {
  "stations": [
   {
    "id": "straight_center",
    "kind": "straight",
    "x_m": 0.0
   },
   {
    "id": "arc_apex",
    "kind": "arc",
    "azimuth_deg": 0.0
   }
  ],
  "turn_indices_along_normal": [
   1,
   2,
   5,
   10,
   20
  ],
  "tape_indices_along_width": [
   1,
   3
  ],
  "width_quadrature": "gauss_lobatto",
  "width_points": 5
 },
 "limits": {
  "max_along_current_field_fraction": 0.2,
  "max_self_field_ratio": 0.1,
  "interpolation_overprediction_budget": 0.1,
  "utilization_limit": 0.8,
  "self_field_correction": "critical_state_strip",
  "critical_state_layer_thickness_m": 1e-06
 },
 "numerics": {
  "quadrature_orders": [
   10,
   14
  ],
  "field_scale_t": 1.0,
  "max_refinement_change_fraction": 0.0025,
  "max_reference_refinement_fraction": 0.0001,
  "max_reference_field_error_fraction": 0.001,
  "max_reference_angle_error_deg": 0.0001,
  "max_reference_capacity_relative_error": 1e-05,
  "reference_subset": [
   {
    "station": "straight_center",
    "tape_index": 3,
    "turn_index": 1
   },
   {
    "station": "straight_center",
    "tape_index": 3,
    "turn_index": 10
   },
   {
    "station": "straight_center",
    "tape_index": 1,
    "turn_index": 20
   },
   {
    "station": "arc_apex",
    "tape_index": 3,
    "turn_index": 5
   },
   {
    "station": "arc_apex",
    "tape_index": 1,
    "turn_index": 20
   }
  ]
 },
 "width_transfer": {
  "basis": "none"
 }
}