Design and experiment of electron optical system for 0.22 THz folded waveguide traveling wave tube

Song Rui; Zhou Quanfeng; Lei Wenqiang; Jiang Yi; Hu Peng; Ma Guowu; Chen Hongbin

doi:10.11884/HPLPB201527.093101

Volume 27 Issue 09

Sep. 2015

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Article Navigation > High Power Laser and Particle Beams > 2015 > 27(09): 093101

Wang Qiangqiang, Deng Keli, Deng Caibo, et al. Three-dimensional numeric simulation of multiplication process of secondary electrons in microchannel plate[J]. High Power Laser and Particle Beams, 2015, 27: 124005. doi: 10.11884/HPLPB201527.124005

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Song Rui, Zhou Quanfeng, Lei Wenqiang, et al. Design and experiment of electron optical system for 0.22 THz folded waveguide traveling wave tube[J]. High Power Laser and Particle Beams, 2015, 27: 093101. doi: 10.11884/HPLPB201527.093101

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Design and experiment of electron optical system for 0.22 THz folded waveguide traveling wave tube

doi: 10.11884/HPLPB201527.093101

1.
Institute of Applied Electronics,CAEP,P.O.Box 919-1016,Mianyang 621900,China

Received Date: 2015-06-01
Rev Recd Date: 2015-07-20
Publish Date: 2015-09-14

Abstract

Abstract

This paper introduces the design method of the electron optical system for a 0.22 THz folded waveguide traveling wave tube. As the electron beam current is 10 mA and the beam channel radius of the tube is only about 0.1 mm, the PPM(period permanent magnet) focusing system needs to be carefully designed to transmit this beam current from the electron gun to the collector. A tree-electrode Pierce gun is adopted. The electrodes and PPM are optimized to obtain proper beam waist radius and high transmission efficiency. Maxwell is used to calculate the magnetic flux density on the beam line, and CST is used to simulate the beam transmission. The simulation shows that about 96% of the electron beam reaches the collector and is verified by experiments, which gets about 74% transmission efficiency without magnetic modification. After magnetic modification, the transmission efficiency is improved to 94%, and this tube is able to run in DC mode.
- folded waveguide travelling wave tube,
- electron optical system,
- transmission rate,
- permanent magnetic focusing system

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沈阳化工大学材料科学与工程学院沈阳 110142

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Design and experiment of electron optical system for 0.22 THz folded waveguide traveling wave tube

doi: 10.11884/HPLPB201527.093101

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Design and experiment of electron optical system for 0.22 THz folded waveguide traveling wave tube

doi: 10.11884/HPLPB201527.093101

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