中国物理B ›› 2010, Vol. 19 ›› Issue (12): 124101-124101.doi: 10.1088/1674-1056/19/12/124101
唐昌建1, 王顺金1, 李海容2
Li Hai-Rong(李海容)a)b)†, Tang Chang-Jian(唐昌建)a), and Wang Shun-Jin(王顺金)a)
摘要: This paper addresses the formulae and numerical issues related to the possibility that fast wave may be grown when a relativistic electron beam through an ion channel in a cylindrical metal waveguide. To derive the dispersion equations of the beam–wave interaction, it solves relativistic Lorentz equation and Maxwell's equations for appropriate boundary conditions. It has been found in this waveguide structure that the TM0m modes are the rational operating modes of coupling between the electromagnetic modes and the betatron modes. The interaction of the dispersion curves of the electromagnetic TM0m modes and the upper betatron modes is studied. The growth rates of the wave are obtained, and the effects of the beam radius, the beam energy, the plasma frequency, and the beam plasma frequency on the wave growth rate are numerically calculated and discussed.
中图分类号: (Relativistic electron and positron beams)