Extraction magnetically insulated diode studies on Gamble II

Summary form only given. An extraction magnetically insulated diode (MID) with anode and cathode magnetic field coils has been tested on the National Research Laboratory Gamble II accelerator. The purpose of the experiments is to develop an annular, intense ion beam source for testing ion beam transport physics related to light ion inertial confinement fusion. Initial experiments have been performed with surface flashover ion sources. The experiment challenge has been to obtain a tuning of the four magnetic field coils that results in a minimum turn-on time of the ion source and acceptable coupling to the accelerator. Results from several different geometries of magnetic field have been obtained. The principle diode diagnostics are the total diode current, net ion current, and corrected diode voltage. Calculations of the magnetic field strength and geometry are performed with the ATHETA code. An active anode ion source is also under development.