NDLI: Experimental results from an 8-beam, 5-cavity multiple-beam klystron with 6% bandwidth

Content Provider	IEEE Xplore Digital Library
Author	Abe, D.K. Qiu, J.X. Levush, B. Pershing, D.E. Wright, E.L. Nguyen, K.T. Wood, F.N. Myers, R.E. Eisen, E.L. Chernyavskiy, I.A. Vlasov, A.N.
Copyright Year	2008
Description	Author affiliation: Naval Res. Lab., Washington, DC (Abe, D.K.; Qiu, J.X.; Levush, B.)
Abstract	We describe the results of recent experiments with an eight- beam, five-cavity multiple-beam klystron (MBK). The electron gun is of the same design as used in our previous MBK and operates at a nominal cathode voltage of -45 kV and a total current of 32 A. The electrodynamic circuit is comprised of a two-gap input cavity, a two-gap idler cavity, two additional single-gap idler cavities, and a two-gap output cavity and has a total length of 22 cm. All of the multi-gap cavities operate in the pi-mode. Some of the cavities were loaded with a lossy dielectric to reduce the Q. Output power is extracted from both of the output resonator gaps in four waveguide arms (two on each gap). The tube produces ~ 600 kW of peak output power at saturation with a corresponding electronic efficiency of 40%. Beam transmission is excellent: > 99% in the small-signal regime and > 93% at saturation. Despite a mismatch in the input circuit that reduces the gain in the upper portion of the band, the MBK has a measured 3-dB bandwidth of ~ 6%. We will describe efforts to improve the input circuit match and will compare measured data with the results of numerical modeling using the MAGIC 3D particle-in-cell code and the 2.5D large-signal code, TESLA.
Starting Page	1
Ending Page	1
File Size	40851
Page Count	1
File Format	PDF
ISBN	9781424419296
ISSN	07309244
DOI	10.1109/PLASMA.2008.4590954
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cavity resonators USA Councils Klystrons Bandwidth Plasmas Integrated circuit modeling Solid modeling
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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