Effect of plasma dynamics on impedance behavior in magnetically immersed diodes

Summary form only given. The magnetically immersed diode is being developed as an intense electron beam source for high power X-ray radiography. Electrons are emitted from a needle cathode of 0.5-5 mm diameter and confined in a 10-50 Tesla solenoidal field. These electrons, striking a high atomic number anode converter, can potentially deliver a high brightness source of X-rays for flashradiography. In recent experiments on the 150-kA, 4-MV RITS-3 accelerator at Sandia National Laboratories, using