no_digested

beginning[beta_a]  = 10  
beginning[beta_b]  = 12

parameter[geometry] = open
beginning[e_tot]  = 7e6

! branch 3

em: em_field, l = 2,
    grid_field = {
      field_scale = 0.01,
      geometry = xyz,
      ele_anchor_pt = center,
      r0 = (0.1, 0.2, -1),
      dr = (1,1,2),
      pt(-1,-1, 0) = (1, -1, -1, 0, -4, -2),
      pt(-1, 0, 0) = (1, -1,  0, 0, -2, -1),
      pt(-1, 1, 0) = (1, -1,  1, 0,  0,  0),
      pt( 0,-1, 0) = (1,  0, -1, 0, -2, -1),
      pt( 0, 0, 0) = (1,  0,  0, 0,  0,  0),
      pt( 0, 1, 0) = (1,  0,  1, 0,  2,  1),
      pt( 1,-1, 0) = (1,  1, -1, 0,  0,  0),
      pt( 1, 0, 0) = (1,  1,  0, 0,  2,  1),
      pt( 1, 1, 0) = (1,  1,  1, 0,  4,  2),
      pt(-1,-1, 1) = (1, -1, -1, 1, -4, -1),
      pt(-1, 0, 1) = (1, -1,  0, 1, -2,  0),
      pt(-1, 1, 1) = (1, -1,  1, 1,  0,  1),
      pt( 0,-1, 1) = (1,  0, -1, 1, -2,  0),
      pt( 0, 0, 1) = (1,  0,  0, 1,  0,  1),
      pt( 0, 1, 1) = (1,  0,  1, 1,  2,  2),
      pt( 1,-1, 1) = (1,  1, -1, 1,  0,  1),
      pt( 1, 0, 1) = (1,  1,  0, 1,  2,  2),
      pt( 1, 1, 1) = (1,  1,  1, 1,  4,  3) &
    }, field_calc = fieldmap

mm: marker, superimpose, ref = em, offset = -0.1
m:marker

branch3: line = (em)

!

use, branch3