Study on Nonlinear Theory and Code of Beam-Wave Interaction for Gyroklystron
- 123 Downloads
A nonlinear self-consistent theory of beam-wave interaction for gyroklystron with multiple cavities is analyzed in this paper. The electron motion equations and transient electromagnetic field equations in a complex form are deduced in detail. A calculation code including a time-dependent description of the electromagnetic fields and a self-consistent analysis of the electrons is designed and the corresponding software implementation is achieved using Fortran language. An example is presented for the operation of the code, namely a four-cavity, Ka-band gyroklystron operating in the TE011 mode at the fundamental of the cyclotron frequency. The numerical results show that a maximal saturated peak output power of 330 kW, corresponding to 39% efficiency and a saturated 3-dB bandwidth of 325 MHz is achieved with a 72.8 kv, 11.8 A electron beam at a focused magnetic field of 13 kG and a beam velocity ratio of 1.63 when the speed spread is 5%. By comparison, the numerical results agree with the experimental results.
KeywordsGyroklystron Beam-wave interaction Nonlinear theory
- 8.G. S. Nusinovich. Introduction to the Physics of Gyrotrons [M]. Baltimore and London, The Johns Hopkins University Press, 2004:21–42.Google Scholar
- 11.J. J. Choi, A. H. McCurdy, F. N. Wood, R. H. Kyser, J. P. Calame, K. T. Nguyen, B. G. Danly, T. M. Jr. Antonsen, B. Levush, R. K. Parker Experimental investigation of a high power, two-cavity, 35 GHz Gyroklystron amplifier [J]. IEEE Trans.on Plasma Science, 1998, 26(3): 416–425.CrossRefGoogle Scholar