New experimental results on the gyro-TWT with a helically grooved waveguide
New experimental results on the gyro-TWT with a helically grooved waveguide
复制标题
螺旋槽波导陀螺行波管的新实验结果
DOI：
10.1109/icmmt.2002.1187642
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
A. B. Volkov
中科院分区：
文献类型：
--
作者：
V. Bratman;G. Denisov;V. Manuilov;G. Kalynova;M.M. Ofitserov;S. Samsonov;A. B. Volkov
给出了基于新型微波系统的宽带高效回旋管行波管的实验结果，其波导的形式具有螺旋波纹的内表面。陀螺行波管采用低相对论性绕轴电子束，由热离子尖点枪产生，能量高达 80 keV，电流高达 10 A，脉冲持续时间高达 10 /spl mu/s。光束与螺旋槽波导的工作模式之间的相互作用发生在回旋加速器二次谐波处。实测最大效率为28%，最大输出功率为180kW，饱和增益约为25dB。目前，35.1-36.8 GHz (/spl sim/5%) 的频率带宽受到可用射频驱动源能力的限制。
Experimental results are presented for a frequency-broadband efficient gyrotron traveling wave tube based on a novel microwave system in the form of a waveguide with a helical corrugation of its inner surface. The gyro-TWT utilizes a low-relativistic axis-encircling electron beam with an energy up to 80 keV, current up to 10 A and pulse duration up to 10 /spl mu/s, which is produced by a thermionic cusp gun. The interaction between the beam and an operating mode of a helically grooved waveguide occurs at the second cyclotron harmonic. The maximum efficiency is measured to be 28%, the maximum output power amounts to 180 kW and the saturated gain is about 25 dB. At present the frequency bandwidth of 35.1-36.8 GHz (/spl sim/5%) is limited by capabilities of an available RF driving source.