Author :
Joo, Y.D. ; Sinha, A.K. ; Basu, B.N. ; Park, G.S.
Abstract :
The energy exchange takes place between the linear electron beam and the electromagnetic wave propagating in the helix (E.I. Lien, IEDM Tech. Digest, pp. 412-415, 1979; T. Onodera, IEEE Trans. ED, vol. 35, no 10, 1988; B. Levush, Int. Vacuum Electron. Conf., pp. 71-72, 2002; B. N. Basu, Electromagnetic Theory and Applications in Beam-Wave Electronics, World Publ. Co. Inc. 1996; J. R. Pierce, Traveling Wave Tubes, D Van Nostrand, New York, 1950; L. N. Loshakov et al., Radio Eng. Electron Phys., vol. 13, 1968). For the efficient operation of the device, the beam velocity should be nearly synchronous with the axial phase velocity of the wave over the frequency range. Thus, the dispersion characteristics of helix SWS become of great importance. In this study, rigorous field analysis (B.N. Basu, et al., J. Appl. Phys., vol. 58, no. 9, 1985) of a general asymmetric helical SWS was done.
Keywords :
dispersion (wave); electromagnetic wave propagation; electron beams; slow wave structures; stability; travelling wave tubes; asymmetric helical SWS; asymmetric helical slow-wave structure; beam velocity; dispersion characteristics; efficient operation; energy exchange; field analysis; helix SWS; helix traveling wave tubes; linear electron beam; pi-point instability analysis; propagating electromagnetic wave; wave axial phase velocity; wave frequency range; Coupling circuits; Dielectric constant; Electromagnetic analysis; Electron tubes; Energy exchange; Equations; Frequency; Physics; Power engineering and energy; Propagation constant;
