Electrode-plasma-driven radiation cutoff in long-pulse, high-power microwave devices

Rose, D. V.; Miller, C. L.; Portillo, S.; Welch, D. R.
March 2013
Physics of Plasmas;Mar2013, Vol. 20 Issue 3, p034501
Academic Journal
The impact of electrode plasma dynamics on the radiation production in a high power microwave device is examined using particle-in-cell simulations. Using the design of a compact 2.4 GHz magnetically insulated line oscillator (MILO) as the basis for numerical simulations, we characterize the time-dependent device power and radiation output over a range of cathode plasma formation rates. These numerical simulations can self-consistently produce radiation characteristics that are similar to measured signals in long pulse duration MILOs. This modeling capability should result in improved assessment of existing high-power microwave devices and lead to new designs for increased radiation pulse durations.


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