Paramagnetics/halbach_optimization.json at master · alpha027/Paramagnetics · GitHub

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{
 "halbach_optimization": {

  "_comment": "Every value here is the default, so an optimizer run with no configuration file at all is this file. It is the design of HalbachOptimisation/homogeneityOptimisation.py: a cylinder of 23 rings 22 mm apart, each position choosing one of 19 (radius, magnet count) pairs, in two layers 21 mm apart.",

  "ring_count": 23,
  "ring_separation": 0.022,

  "candidates": [
   {"radius": 0.148, "count": 50},
   {"radius": 0.151, "count": 51},
   {"radius": 0.154, "count": 52},
   {"radius": 0.156, "count": 53},
   {"radius": 0.159, "count": 54},
   {"radius": 0.162, "count": 55},
   {"radius": 0.165, "count": 56},
   {"radius": 0.168, "count": 57},
   {"radius": 0.171, "count": 58},
   {"radius": 0.174, "count": 59},
   {"radius": 0.177, "count": 60},
   {"radius": 0.180, "count": 61},
   {"radius": 0.183, "count": 62},
   {"radius": 0.186, "count": 63},
   {"radius": 0.189, "count": 64},
   {"radius": 0.192, "count": 65},
   {"radius": 0.195, "count": 66},
   {"radius": 0.198, "count": 67},
   {"radius": 0.201, "count": 68}
  ],

  "outer_radius_offset": 0.021,
  "outer_count_offset": 7,

  "order": 1,

  "element": {
   "size": 0.012,
   "remanence": 1.3
  },

  "dsv": 0.2,
  "resolution": 0.005,

  "symmetry": "octant",
  "objective": "ppm_bx",
  "field_model": "cuboid",

  "genetic": {
   "population": 10000,
   "generations": 100,
   "cx_prob": 0.55,
   "mut_prob": 0.4,
   "gene_mut_prob": 0.05,
   "tournament": 3,
   "elitism": 1,
   "seed": 42
  }
 }
}