7.8 GHz power generation device design using a rectangular dielectric-loaded waveguide

• 来源期刊: 中国物理B（英文版）
• 关键词: dielectric-loaded rectangular waveguide high power relativistic electron beam
• 年，卷（期）: 2009,（6）
• 页码范围: 2445-2451
• 页数: 7页
• 语种: 英文

摘要

In this paper, we present a design where a bunched relativistic electron beam traversing inside the rectangular dielectric-loaded (DL) waveguide is used as a high power microwave generation device. Two kinds of methods of calculating the electromagnetic (EM) field excited by a bunched beam are introduced, and in the second method the calculation of EM pulse length is discussed in detail. The desired operating mode is the LSM11 due to its strong interaction with the electron beam. For the designed 7.8 GHz operating frequency, with a 100 nC/bunch drive train of electron bunches separated by 0.769 ns, we find that high gradient (＞ 30 MV/m) and high power (＞ 160 MW) can be generated. An output coupler is also designed which is able to extract the generated power to standard waveguides with a 94% coupling efficiency.