Abstract
A novel magnetically insulated transmission line oscillator (MILO) with high efficiency has been proposed, based on a kind of conventional MILO. The new MILO has two typical characteristics. First, the width of the anode vanes decreases gradually, and especially, the extraction vane decreases to be the minimal. Therefore, the proportion of the electrons, which have little or no contribution to the beam–wave interaction, is decreased. As a result, the efficiency is enhanced. In addition, there is an extra extraction cavity designed behind the extraction vane. So the beam–wave interaction process is lengthened, and the extraction efficiency is enhanced. The results of the particle-in-cell simulation show that the power efficiency of this MILO can be elevated to be 20.5%, while it is only 14.4% for the conventional MILO.
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