Experimental studies of overmoded relativistic backward-wave oscillators

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dc.contributor.author Abe, David
dc.contributor.author Carmel, Yuval
dc.contributor.author Miller, Susanne
dc.contributor.author Bromborsky, Alan
dc.contributor.author Levush, Baruch
dc.contributor.author Antonsen, Thomas Jr
dc.contributor.author Destler, William
dc.date.accessioned 2009-06-08T16:21:56Z
dc.date.available 2009-06-08T16:21:56Z
dc.date.issued 1998-06
dc.identifier.citation IEEE Transactions onPlasma Science, vol. 26, no. 3, June 1998 en_US
dc.identifier.uri http://hdl.handle.net/1850/9774
dc.description.abstract Internal field-emission breakdown in the electrodynamic structures of high-power microwave (HPM) devices can seriously limit the device’s output power and pulse duration. Increasing the diameter of the electrodynamic structure to several times an electromagnetic wavelength can reduce these internal fields to below critical breakdown levels, but may introduce mode competition as an unwanted side effect. This paper presents the design and results of experiments with overmoded (D / (lambda) ~ 3), sinusoidally corrugated backward-wave oscillators (BWO’s) that successfully produced TM01, high-power microwave radiation in the frequency range of 5.2–5.7 GHz. Overmoded BWO’s reproducibly generated ~200 MW of peak power with corresponding efficiencies of ~4%. Pulse shortening was not observed in any of the experiments. The radiation generated by the devices was highly coherent (typically, (delat)f / f < 0:5%) and corresponded to a fundamental TM01 -mode interaction. The experimental results were compared with calculations made with recently developed nonlinear models; the measured data are shown to agree favorably with theory. The results of the experiments and modeling demonstrate that overmoded electrodynamic structures can be used to decrease internal electric field stresses while avoiding multimode generation and maintaining good spectral purity. *Please refer to full-text for correct equations en_US
dc.language.iso en_US en_US
dc.publisher Institute of Electrical and Electronics Engineers en_US
dc.relation.ispartofseries vol. 26 en_US
dc.relation.ispartofseries no. 3 en_US
dc.subject Backward-wave oscillator (BWO) en_US
dc.subject high-power microwave (HPM) en_US
dc.subject overmoded en_US
dc.title Experimental studies of overmoded relativistic backward-wave oscillators en_US
dc.type Article en_US

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