Measurements of large ion currents in a pinched relativistic electron beam diode

Abstract
We have observed ion currents of 10–20% of the total diode current in a diode exhibiting pinched electron flow. Measurements have been made utilizing two independent techniques—multiple Faraday cups, and neutron generation and counting. The results agree well with each other and are compared with both numerical simulations and an analytic model of ion flow. Agreement is found to within the accuracy of the experimental measurement, lending further credence to the theoretical models.