带状注扩展互作用速调管具有高峰值功率和高平均功率的特点,是一种具有广泛应用前景的电真空器件.基于电子流振荡理论,在小信号条件下推导了纵向模式为2π模的三间隙谐振腔的电子负载电导和电子负载电纳的表达式,分析了等离子体频率、...带状注扩展互作用速调管具有高峰值功率和高平均功率的特点,是一种具有广泛应用前景的电真空器件.基于电子流振荡理论,在小信号条件下推导了纵向模式为2π模的三间隙谐振腔的电子负载电导和电子负载电纳的表达式,分析了等离子体频率、间隙宽度和相邻间隙中心之间的距离等参数对电子负载电导和电子负载电纳的影响.根据理论分析结果,结合三维电磁仿真软件完成了一款工作于W波段的带状注扩展互作用速调管放大器的模拟设计.电子注横截面尺寸为4 mm×0.32 mm时,在工作电压为19.5 k V,电流为3.5 A,输入功率为1 W,轴向引导磁场为0.85 T的条件下,频率94.47 GHz处得到输出功率为5773 W,增益为37.6 d B,电子效率为8.46%,3 d B带宽约140 MHz.展开更多
We report a high power high beam quality quasi-continuous-wave(QCW)diode-end-pumped Nd:YAG slab amplifier at 1319 nm.The strongest 1064 nm parasitic oscillation has been successfully suppressed by reasonable coating d...We report a high power high beam quality quasi-continuous-wave(QCW)diode-end-pumped Nd:YAG slab amplifier at 1319 nm.The strongest 1064 nm parasitic oscillation has been successfully suppressed by reasonable coating design.In a five-pass configuration,the amplifier yields a 42.3 W linearly polarized 1319 nm output at repetition rate of 1 kHz with pulse duration of 75μs and beam quality factors of M^(2)_(x)=1.13 and M^(2)_(y)=2.16 in the orthogonal directions.The fluctuation of the amplifier output power is measured to be±0.6%.Furthermore,a computational model of QCW pulse amplification is employed to examine the amplification process.展开更多
文摘带状注扩展互作用速调管具有高峰值功率和高平均功率的特点,是一种具有广泛应用前景的电真空器件.基于电子流振荡理论,在小信号条件下推导了纵向模式为2π模的三间隙谐振腔的电子负载电导和电子负载电纳的表达式,分析了等离子体频率、间隙宽度和相邻间隙中心之间的距离等参数对电子负载电导和电子负载电纳的影响.根据理论分析结果,结合三维电磁仿真软件完成了一款工作于W波段的带状注扩展互作用速调管放大器的模拟设计.电子注横截面尺寸为4 mm×0.32 mm时,在工作电压为19.5 k V,电流为3.5 A,输入功率为1 W,轴向引导磁场为0.85 T的条件下,频率94.47 GHz处得到输出功率为5773 W,增益为37.6 d B,电子效率为8.46%,3 d B带宽约140 MHz.
基金Supported by the National Basic Research Program of China under Grant No 2010CB630706the National High-Technology Research and Development Program under Grant No 2011AA030202the National Natural Science Foundation of China under Grant No 50990304.
文摘We report a high power high beam quality quasi-continuous-wave(QCW)diode-end-pumped Nd:YAG slab amplifier at 1319 nm.The strongest 1064 nm parasitic oscillation has been successfully suppressed by reasonable coating design.In a five-pass configuration,the amplifier yields a 42.3 W linearly polarized 1319 nm output at repetition rate of 1 kHz with pulse duration of 75μs and beam quality factors of M^(2)_(x)=1.13 and M^(2)_(y)=2.16 in the orthogonal directions.The fluctuation of the amplifier output power is measured to be±0.6%.Furthermore,a computational model of QCW pulse amplification is employed to examine the amplification process.
