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Nonlinear modeling of plasma shielding effect during high-power microwave breakdown

机译:大功率微波击穿过程中等离子体屏蔽效应的非线性建模

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The high-power microwave (HPM) breakdown in air would result in a sharp increase of the number density of the plasma, which generates strong secondary electromagnetic (EM) fields that can cancel the incident fields and act like a macroscopic plasma shield. If such an air breakdown takes place in a HPM device, it will result in the so-called tail erosion and severely limit the performance of the device. In this paper, the EM-plasma interaction and the HPM air breakdown are modeled by a coupled nonlinear EM-plasma system, which is solved by a coupled nodal discontinuous Galerkin time-domain (DGTD) scheme. The air breakdown and plasma formation in a metallic aperture are simulated to demonstrate the capability of the DGTD method in the modeling of HPM breakdown problems.
机译:空气中的高功率微波(HPM)击穿将导致等离子体的数量密度急剧增加,从而产生强大的次级电磁(EM)场,该场可以抵消入射场并起到宏观等离子屏蔽的作用。如果在HPM设备中发生这种空气击穿,将导致所谓的尾部腐蚀,并严重限制设备的性能。在本文中,通过耦合非线性EM-等离子体系统对EM-等离子体相互作用和HPM空气击穿进行建模,该系统通过耦合节点不连续Galerkin时域(DGTD)方案求解。模拟了金属孔径中的空气击穿和等离子体形成,以证明DGTD方法在HPM击穿问题建模中的能力。

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