NDLI: Nonlinear theory of harmonic peniotron and gyrotron interactions in a rising-sun slotted waveguide

Content Provider	IEEE Xplore Digital Library
Author	Ganguly, A.K. Park, G.S. Armstrong, C.M.
Copyright Year	1973
Abstract	A fully three-dimensional nonlinear theory is presented for the generation of harmonic peniotron and gyrotron radiation from a gyrating electron beam propagating through a multistage rising-sun type slotted waveguide. For an axisymmetric beam, a strong peniotron interaction is present if the dominant azimuthal mode index, l, of the waveguide modes is equal to s=l-1 where s is the cyclotron harmonic number and the gyrotron interaction is strong when l=s. Numerical results are shown for a two-stage, six-vane rising-sun circuit to illustrate the stable and efficient operation of the second harmonic peniotron in the /spl pi/-mode (TE/sub 31/-like). The modes competing with the gyropeniotron amplification mechanism are suppressed in the two-stage rising-sun configuration. Simulations show that second harmonic gyropeniotron amplifier in the /spl pi/-mode can operate at an efficiency of 45% with a 70-kV, 3-A beam having a velocity ratio 1.4, an axial velocity spread of 4%, and a guiding center spread of 4% in the presence of a guide magnetic field 2% below grazing. The instantaneous bandwidth of the amplifier is 4.6%. Since the spent beam is nearly monoenergetic, extremely high efficiency in excess of 70% could be achieved by using a single stage depressed collector to recover energy from the beam.<>
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	902
Ending Page	912
Page Count	11
File Size	1069064
File Format	PDF
ISSN	00933813
Volume Number	22
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gyrotrons Waveguide theory Electron beams Radio frequency Cyclotrons Electromagnetic waveguides Magnetic fields Millimeter wave technology Radiofrequency amplifiers Circuits
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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