变磁场回旋管物理特性的数值研究

本文用数值计算方法研究了非线性情况下,外加磁场沿轴线缓慢变化时回旋振荡管互作用的物理特性。改进了文献中使用的运动方程,使其更普适和精确。并按频率缩尺对公式进行归一化。取得典型回旋振荡管特性在外加静磁场沿轴向缓慢变化时的数值结果。讨论了变磁场回旋管效率提高的物理机理及其对回旋管工作状态的影响。制作了电子相位群聚图,得到的清晰图象说明缓变的外加磁场可以使回旋管互作用的饱和状态延迟出现。 关键词：

NUMERICAL STUDY OF THE PHYSICAL CHARACTERESTICS IN THE GYROTRON WITH A VARYING MAGNETIC FIELD

In this paper, the physical characterestics of the interaction in a gyrotron with a longitudinally varying magnetic field is presented. Equations of motion used in reference are improved by expressing them in normalized form and making them more accurate and more generally applicable. Numerical results are obtained for a pratical case. The physical mechanism of efficiency enhancement with varying magnetic field and its effect on the gyrotron operation are discussed. Phase bunching diagrams demonstrate that the saturation phenomena will be delayed when such varying magnetic field is present.