template Drift(10)
  int num
  char name
  int num_anode
  child LayerDRFAno
  child OffsetDRFAno
  int num_cathode
  child LayerDRFCatho
  real rmin
  real rmax
  real z0
  real zlen
  material material
  real thick_boun(4)  ! rmin, rmax, zmin, zmax
  material mat_boun(4)    ! rmin, rmax, zmin, zmax
end template