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In this study, we focused on the dc-rf efficiency and back-bombardment of a 2.45 GHz oven magnetron. We conducted 3D particle-in-cell (PIC) simulations for estimating the dc-rf efficiency and the back-bombardment quantitatively. The back-bombardment causes short lifetime by deteriorating the cathode. In addition, the increase of back-bombardment reduces dc-rf efficiency. We compared two types of filament...
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