Recirculating Planar Magnetron modeling and experiments

Summary form only given. The Recirculating Planar Magnetron (RPM) is a new class of crossed-field device that combines the advantages of high-efficiency recirculating devices with those of planar devices: both large-area cathode (high current) and anode (improved thermal management). Two embodiments of the RPM are modeled and under design: 1) Axial magnetic field with radial electric field (Fig. 1) and 2) Radial magnetic field and axial electric field (Fig.2). Experimental design and testing of the non-inverted field configuration (Fig. 1) are currently underway at the University of Michigan. The 12-cavity prototype magnetron will operate in pi-mode at 1-GHz with DC radial electric and axial magnetic field at 200-300 kV and 0.15 T for 0.5-1 microsecond pulse lengths.