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Title: Relativistic electron motion in cylindrical waveguide with strong guiding magnetic field and high power microwave

Abstract

In O-type high power microwave (HPM) devices, the annular relativistic electron beam is constrained by a strong guiding magnetic field and propagates through an interaction region to generate HPM. Some papers believe that the E × B drift of electrons may lead to beam breakup. This paper simplifies the interaction region with a smooth cylindrical waveguide to research the radial motion of electrons under conditions of strong guiding magnetic field and TM{sub 01} mode HPM. The single-particle trajectory shows that the radial electron motion presents the characteristic of radial guiding-center drift carrying cyclotron motion. The radial guiding-center drift is spatially periodic and is dominated by the polarization drift, not the E × B drift. Furthermore, the self fields of the beam space charge can provide a radial force which may pull electrons outward to some extent but will not affect the radial polarization drift. Despite the radial drift, the strong guiding magnetic field limits the drift amplitude to a small value and prevents beam breakup from happening due to this cause.

Authors:
 [1];  [2]; ;  [3]
  1. Department of Engineering Physics, Tsinghua University, Beijing 100084 (China)
  2. (China)
  3. Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China)
Publication Date:
OSTI Identifier:
22410451
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; CYLINDRICAL CONFIGURATION; ELECTRON BEAMS; ELECTRON DRIFT; ELECTRONS; INTERACTIONS; MAGNETIC FIELDS; MICROWAVE RADIATION; PARTIAL DIFFERENTIAL EQUATIONS; POLARIZATION; RELATIVISTIC RANGE; SPACE CHARGE; TRAJECTORIES; WAVEGUIDES

Citation Formats

Wu, Ping, Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024, Sun, Jun, and Cao, Yibing. Relativistic electron motion in cylindrical waveguide with strong guiding magnetic field and high power microwave. United States: N. p., 2015. Web. doi:10.1063/1.4922676.
Wu, Ping, Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024, Sun, Jun, & Cao, Yibing. Relativistic electron motion in cylindrical waveguide with strong guiding magnetic field and high power microwave. United States. doi:10.1063/1.4922676.
Wu, Ping, Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024, Sun, Jun, and Cao, Yibing. Mon . "Relativistic electron motion in cylindrical waveguide with strong guiding magnetic field and high power microwave". United States. doi:10.1063/1.4922676.
@article{osti_22410451,
title = {Relativistic electron motion in cylindrical waveguide with strong guiding magnetic field and high power microwave},
author = {Wu, Ping and Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 and Sun, Jun and Cao, Yibing},
abstractNote = {In O-type high power microwave (HPM) devices, the annular relativistic electron beam is constrained by a strong guiding magnetic field and propagates through an interaction region to generate HPM. Some papers believe that the E × B drift of electrons may lead to beam breakup. This paper simplifies the interaction region with a smooth cylindrical waveguide to research the radial motion of electrons under conditions of strong guiding magnetic field and TM{sub 01} mode HPM. The single-particle trajectory shows that the radial electron motion presents the characteristic of radial guiding-center drift carrying cyclotron motion. The radial guiding-center drift is spatially periodic and is dominated by the polarization drift, not the E × B drift. Furthermore, the self fields of the beam space charge can provide a radial force which may pull electrons outward to some extent but will not affect the radial polarization drift. Despite the radial drift, the strong guiding magnetic field limits the drift amplitude to a small value and prevents beam breakup from happening due to this cause.},
doi = {10.1063/1.4922676},
journal = {Physics of Plasmas},
number = 6,
volume = 22,
place = {United States},
year = {Mon Jun 15 00:00:00 EDT 2015},
month = {Mon Jun 15 00:00:00 EDT 2015}
}