based on buff1_poi
$REG CONV=1.000000, NREG=3, DX=0.01, XMAX=2.000000, YMAX=0.250000
XMIN=0.000000, YMIN=0.000000, NPOINT=8 $
$PO X=0.000000, Y=0.000000 $
$PO X=0.200000, Y=0.000000 $
$PO X=0.500000, Y=0.000000 $
$PO X=2.000000, Y=0.000000 $
$PO X=2.000000, Y=0.250000 $
$PO X=1.100000, Y=0.250000 $
$PO X=0.000000, Y=0.250000 $
$PO X=0.000000, Y=0.000000 $
$REG MAT=1, CUR=0.000000, NPOINT=7 $
$PO X=0.000000, Y=0.000000 $
$PO X=0.200000, Y=0.000000 $
$PO X=0.000000, Y=0.150000, X0=0.350000, Y0=0.000000, NT=2, R=0.150000 $
$PO X=1.000000, Y=0.150000 $
$PO X=0.100000, Y=0.000000, X0=1.000000, Y0=0.250000, NT=2, R=0.100000 $
$PO X=0.000000, Y=0.250000 $
$PO X=0.000000, Y=0.000000 $
$REG MAT=3, NPOINT=4 $
$PO X=0.200000, Y=0.000000 $
$PO X=0.500000, Y=0.000000 $
$PO X=0.000000, Y=0.150000, X0=0.350000, Y0=0.000000, NT=2, R=0.150000 $
$PO X=-0.150000, Y=0.000000, X0=0.350000, Y0=0.000000, NT=2, R=0.150000 $