Measurement of Asymmetric Flux in the Gap of an Induction Accelerator Module

A unique transverse field probe is used to determine the effect of feed and load current asymmetries on the axial magnetic field symmetry in the acceleration gap of a linear induction accelerator module. The special probe was used to quantitatively measure transverse pulse magnetic fields down to one gauss in the presence of large common mode noise signals and 107V/M pulse electric fields. Module tests using the probe provided a direct measure of the asymmetric fields produced when unbalanced conditions occurred. It also verified that under normal balanced operation the on-axis transverse-field is less than one gauss.