Nonlinear time-dependent simulation of helix traveling wave tubes
  • 【DOI】

    10.1088/1674-1056/20/7/078401

  • 【摘要】

    A one-dimensional nonlinear time-dependent theory for helix traveling wave tubes is studied.A generalized electromagnetic field is applied to the expression of the radio frequency field.To simulate th... 展开>>A one-dimensional nonlinear time-dependent theory for helix traveling wave tubes is studied.A generalized electromagnetic field is applied to the expression of the radio frequency field.To simulate the variations of the high frequency structure,such as the pitch taper and the effect of harmonics,the spatial average over a wavelength is substituted by a time average over a wave period in the equation of the radio frequency field.Under this assumption,the space charge field of the electron beam can be treated by a space charge wave model along with the space charge coefficient.The effects of the radio frequency and the space charge fields on the electrons are presented by the equations of the electron energy and the electron phase.The time-dependent simulation is compared with the frequency-domain simulation for a helix TWT,which validates the availability of this theory. 收起<<

  • 【作者】

  • 【作者单位】

    Vacuum Electronics National Laboratory

  • 【刊期】

    中国物理B ISTIC EI SCI 2011年7期

  • 【关键词】

    螺旋线行波管  频域模拟  时间变化  非线性  空间电荷场  时间平均  无线电频率  电子束  helix traveling wave tubes  time-dependent  harmonics  helix pitch taper 

  • 【基金项目】

    the National Natural Science Foundation of China(60601004;60801029;10876005;; 60931001)