Efficiency Enhancement in Gyrotron Backward Wave Oscillator with a Nonlinearly Tapered Structure

摘要：

Efficiency enhancement in a gyrotron backward wave oscillator (gyro-BWO) with a nonlinearly tapered waveguides is investigated with a self-consistent code. It is shown that the interaction efficiency can be enhanced significantly to a value as high as 61%. Mechanism of the efficiency enhancement is interpreted physically via phase space diagrams. The gyrotron backward wave oscillator (gyro-BWO), based on the electron cyclotron maser instability, is the only tunable version of gyrotrons. 1. However, its efficiency is known to be the lowest among all gyrotron devices. The main reason is that the gyro-BWO field in a uniform interaction structure peaks upstream, which results in abrupt electron bunching and debunching to prevent efficient interaction 2. To remedy this problem, there have been studies on linearly tapered magnetic field 3 and linearly tapered interaction structure 4, both resulting in significant efficiency enhancement.

作者: P.N.Lin S.H.Kao G.N.Lin C.C.Chiu K.R.Chu

作者单位: Department of Physics, National Tsing Hua University,Hsinchu 300, Taiwan Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan

会议类型: 国际会议

会议名称: 2010 8th International Vacuum Electron Sources Conference and NANOcarbon(第八届真空电子源和纳米碳国际会议)

会议地点: 南京

会议语种:英文

页码: 150-151

在线出版日期: 2010-10-14（万方平台首次上网日期，不代表论文的发表时间）