S波段锥形磁绝缘线振荡器长脉冲实验研究

 对一种由弱变和强变结构组成的锥形磁绝缘线振荡器进行了长脉冲实验研究。在二极管电压350 kV左右、电流约25 kA、脉宽约128 ns的条件下，获得了500 MW、脉宽约90 ns的高功率微波输出。对波形中出现的拐点进行了分析，研究表明：二极管电压波形好坏会对微波源的性能造成严重的影响，较好的电压波形是实现长脉冲运行的关键。同时对采用不锈钢平面负载、不锈钢丝网状负载以及石墨负载电子收集极进行了实验研究，研究表明采用石墨收集极可以输出较好的微波波形。

Experimental research of S-band tapered magnetically insulated transmission line oscillator at long-pulse operation

An S-band tapered magnetically insulated transmission line oscillator with slowly tapered vanes and sharply tapered vanes has been studied at long-pulse operation. Under the diode voltage of 350 kV, the diode current of 25 kA and the pulse duration of 128 ns, the output microwave with the power of 500 MW and the pulse duration of 90 ns has been obtained in the experiments. Further analysis showed that the poor microwave shape attributed to the poor diode voltage waveform and better diode voltage waveform was crucial to achieving a longer microwave pulse. In addition, two kinds of load structure were used to collect the e-beams. The experimental results indicat that using the graphite load could get the better performance than the stainless steel load.