摘要
提出了一种增加回旋行波放大器带宽的新模型,其特点是适当地选取轴向引导磁场的初值并从相互作用区的给定位置开始使其缓慢地线性减小.该模型的输出带宽可达到已有宽带模型的水平,但效率有较大提高.对波束相互作用的物理机制进行了理论分析并用数值模拟的方法进行了证实.当电子束的电流为7A,电压为90kV,速率比为10,纵向动量散度为2%时,计算得到了20%的常数驱动带宽和42%的效率,输出的峰值功率和增益分别为260kW和47dB.
A new model is presented for broadening the bandwidth of a Gyro\|TWT amplifier. The output bandwidth is comparable to that of the existing wideband model, but the efficiency is much improved. In this model, after choosing a proper initial magnitude, the axial magnetic field has a slight linear decrease from a given position in the interaction section. The interaction mechanism of the beam\|wave is analyzed and verified by numerical simulation. When the beam current is 7A, voltage is 90kV, the velocity ratio is 1.0 and the axial velocity spread is 2%, numerical results show a constant bandwidth of 20% with an efficiency 42%, the peak power and gain are, respectively, 260kW and 47dB.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第2期277-281,共5页
Acta Physica Sinica
