Intense ion beam production in a ballistic focusing diode

The results of experimental investigation of intense ion beam (IIB) production in a coaxial magnetic insulated diode are presented. The diode consists of a coaxial external anode of 94-120 mm diameter and internal cathode with longitudinal slits of 12 mm width. Two types of insulating magnetic fields: Bsub(Z)-field created by external solenoid and Bsub(o)-pulse field obtained in the course of current transmission from the external battery along the cathode. In the regime with Bsub(Z)=0,42 T the IID amplitudes for anodes from teflon, copper, lead have reached 3,7, 1, 1,3 kA and densities - 330 A/cm2, 87 A/cm2, 114 A/cm2, respectively. In the regime with Bsub(o)=1 T maximum IIB density on the cathode surface has reached 220 A/cm2, IIB maximum current constitutes 10 and 11 kA for the current getting to the cathode ribs and penetrating into slits, respectively. The production efficiency constitutes 67%