QUAD2_SHORT[wall]= { superimpose = .true., thickness = 0.00001,       &
                     section = { type = wall_start, s = 0.,                  v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                             v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} }, &
                     section = { type = wall_end,   s = dThetaQshort*radius+0.00001, v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                            v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} } }
QUAD2_SHORT[aperture_at] = continuous
QUAD2_SHORT[aperture_type] = wall3d

QUAD2_LONG[wall]= { superimpose = .true., thickness = 0.00001,       &
                     section = { type = wall_start, s = 0.,                  v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                             v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} }, &
                     section = { type = wall_end,   s = dThetaQLong*radius+0.00001, v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                            v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} } }
QUAD2_LONG[aperture_at] = continuous
QUAD2_LONG[aperture_type] = wall3d

!QUAD3_SHORT[wall]= { superimpose = .true., thickness = 0.00001,       &
!                     section = { type = wall_start, s = 0.,                  v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
!                                                                             v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} }, &
!                     section = { type = wall_end,   s = dThetaQshort*radius+0.00001, v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
!                                                                            v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} } }
!QUAD3_SHORT[aperture_at] = continuous
!QUAD3_SHORT[aperture_type] = wall3d

QUAD3_LONG[wall]= { superimpose = .true., thickness = 0.00001,       &
                     section = { type = wall_start, s = 0.,                  v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                             v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} }, &
                     section = { type = wall_end,   s = dThetaQLong*radius+0.00001, v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                            v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} } }
QUAD3_LONG[aperture_at] = continuous
QUAD3_LONG[aperture_type] = wall3d

!QUAD4_SHORT[wall]= { superimpose = .true., thickness = 0.00001,       &
!                     section = { type = wall_start, s = 0.,                  v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
!                                                                             v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} }, &
!                     section = { type = wall_end,   s = dThetaQshort*radius+0.00001, v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
!                                                                            v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} } }
QUAD4_SHORT[aperture_at] = continuous
QUAD4_SHORT[aperture_type] = wall3d

QUAD4_LONG[wall]= { superimpose = .true., thickness = 0.00001,       &
                     section = { type = wall_start, s = 0.,                  v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                             v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} }, &
                     section = { type = wall_end,   s = dThetaQLong*radius+0.00001, v(1)={0.05025,-0.05025}, v(2)={0.05025, 0.05025}, &
                                                                            v(3)={-0.05025,0.05025}, v(4)={-0.05025,-0.05025} } }
QUAD4_LONG[aperture_at] = continuous
QUAD4_LONG[aperture_type] = wall3d