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

Content Provider	IEEE Xplore Digital Library
Author	Rui Song Quanfeng Zhou Wenqiang Lei Yi Jiang Peng Hu Guowu Ma Hongbin Chen
Copyright Year	2015
Description	Author affiliation: CAEP, Inst. of Appl. Electron., Mianyang, China (Rui Song; Quanfeng Zhou; Wenqiang Lei; Yi Jiang; Peng Hu; Guowu Ma; Hongbin Chen)
Abstract	This paper introduces the design method of the electron optical system for a 0.22THz folded waveguide traveling wave tube. As the electron beam current is 10mA and the beam channel radius of the tube is only about 0.1mm, 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 range to get 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 80% 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 93%, and this tube is able to run in DC mode.
Starting Page	1
Ending Page	2
File Size	298417
Page Count	2
File Format	PDF
ISBN	9781479971091
e-ISBN	9781479971107
DOI	10.1109/IVEC.2015.7224000
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-04-27
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic flux Electron tubes Electron beams Optical waveguides Magnetic noise Magnetic shielding Electron optics transmission efficiency Terahertz folded waveguide travelling wave tube electron optical system PPM
Content Type	Text
Resource Type	Article

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