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Direct experimental observation of π-mode oscillation in a relativistic magnetron

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4 Author(s)
Smith, R.R. ; Phys. Int. Co., San Leandro, CA, USA ; Sze, H. ; Harteneck, B. ; Benford, J.

The authors report the direct measurement of the operating mode of a relativistic magnetron. The S-band 2.65-GHz magnetron used has a washer cathode and is driven by a 1-MV 2.8-Ω 65-ns pulser. Power and pulse shape are measured simultaneously by calibrated couplers, cables, and crystal diodes. The frequency is measured as the heterodyne or difference frequency between a local oscillator and the extracted signal. This difference frequency is several-hundred megahertz. By directly measuring the phase relationship, any questions concerning perturbations of the resonance by the large current of relativistic electrons are avoided

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Plasma Science, IEEE Transactions on  (Volume:16 ,  Issue: 2 )