Zero Field at cathode using bucking coil

Current Inom, Bucking coil current: -1.764A
Current 100 Amps, Bucking Coil current: -.815
Current 125 Amps, Bucking Coil current: -1.091
Current 150 Amps, Bucking Coil current: -1.374
Current 175 Amps, Bucking Coil current: -1.849
Current 200 Amps, Bucking Coil current: -2.500
Current 225 Amps, Bucking Coil current: -3.795
Current 250 Amps, Bucking Coil current: -5.351
Current 270 Amps, Bucking Coil current: -6.781