【摘要】 数值计算了一种填充等离子体的波纹波导结构的行波管 ,在强引导磁场下 ,被一环形相对论电子注驱动的小信号增益。详细地分析了等离子体的浓度、电子注的电压、电流及其在慢波结构中的传输位置对行波管的增益、带宽和中心频率的影响更多还原

【Abstract】 A cold and uniform plasma-filled traveling wave tube with sinusoidally corrugated slow wave structure is driven by a finite thick annular intense relativistic electron beam and the entire system is immersed in a strong longitudinal magnetic field. By means of the linear field theory, the dispersion relation for the traveling wave tube (RTWT) is derived. The dispersion characteristic of the RTWT is analyzed by numerical computation. The trend of the change for gain, bandwidth and center frequency of the RTWT is discussed in detail in different cases of various densities of plasma, transmission places of electron beam, voltages as well as currents. Some useful results are obtained on the basis of the discussion.更多还原