Numerical investigation of space charge electric field for a sheet electron beam between two conducting planes

Pramana ◽  
2002 ◽  
Vol 58 (1) ◽  
pp. 67-77 ◽  
Author(s):  
Arti Gokhale ◽  
Preeti Vyas ◽  
J Panikar ◽  
Y Choyal ◽  
K P Maheshwari
Keyword(s):  
Electron Beam ◽  
Electric Field ◽  
Space Charge ◽  
Numerical Investigation ◽  
Sheet Electron Beam

Electron beam modeling and analyses of the electric field distribution and space charge effect

2021 ◽  
Author(s):  
Jiang Yueling ◽  
Dong Quanlin
Keyword(s):  
Electron Beam ◽  
Electric Field ◽  
Space Charge ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Space Charge Effect ◽  
Electron Beam Current ◽  
Field Calculation ◽  
Charge Effect ◽  
Cross Sectional

Abstract In electron beam technology, the critical focus of research and development efforts is on improving the measurement of electron beam parameters. The parameters are closely related to the generation, emission, operation environment, and role of the electron beam and the corresponding medium. In this study, a field calculation method is proposed, and the electric field intensity distribution on the electron beam’s cross-section is analyzed. The characteristics of beam diffusion caused by the space charge effect are investigated in a simulation, obtained data are compared with the experiment. The simulation demonstrated that the cross-sectional electric field distribution is primarily affected by the electron beam current, current density distribution, and electron beam propagation speed.

scholarly journals Space charge electrostatic fields and focusing of a sheet electron beam with diffused edges

1999 ◽  
Vol 17 (1) ◽  
pp. 1-13
Author(s):  
JAYASHREE PANICKER ◽  
Y. CHOYAL ◽  
K.P. MAHESHWARI ◽  
U. SHARMA
Keyword(s):  
Electron Beam ◽  
Magnetic Fields ◽  
Space Charge ◽  
Electron Beams ◽  
Numerical Study ◽  
Density Variation ◽  
Beam Focusing ◽  
Electrostatic Fields ◽  
Sheet Electron Beam ◽  
The Stability

An analytical and numerical study of the stability of sheet electron beams in periodically cusped magnetic fields (PCM) is made. The beam has been considered as having edges with a prescribed density variation. In estimating the electrostatic fields, we have considered the density variation of both the edges along the width and thickness of the sheet beam. The conditions for beam focusing and beam matching are discussed.

scholarly journals Numerical investigation of space charge effects on the positions of beamlets for transversely split beams

2017 ◽  
Vol 20 (12) ◽  
Author(s):  
S. Machida ◽  
C. Prior ◽  
S. Gilardoni ◽  
M. Giovannozzi ◽  
A. Huschauer ◽  
...  
Keyword(s):  
Space Charge ◽  
Numerical Investigation ◽  
Space Charge Effects ◽  
Charge Effects

scholarly journals Double layers in the downward current region of the aurora

2003 ◽  
Vol 10 (1/2) ◽  
pp. 45-52 ◽  
Author(s):  
R. E. Ergun ◽  
L. Andersson ◽  
C. W. Carlson ◽  
D. L. Newman ◽  
M. V. Goldman
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Phase Space ◽  
Electric Field ◽  
Electric Fields ◽  
Double Layers ◽  
Parallel Electric Field ◽  
Electrostatic Waves ◽  
Current Region ◽  
Decisive Evidence

Abstract. Direct observations of magnetic-field-aligned (parallel) electric fields in the downward current region of the aurora provide decisive evidence of naturally occurring double layers. We report measurements of parallel electric fields, electron fluxes and ion fluxes related to double layers that are responsible for particle acceleration. The observations suggest that parallel electric fields organize into a structure of three distinct, narrowly-confined regions along the magnetic field (B). In the "ramp" region, the measured parallel electric field forms a nearly-monotonic potential ramp that is localized to ~ 10 Debye lengths along B. The ramp is moving parallel to B at the ion acoustic speed (vs) and in the same direction as the accelerated electrons. On the high-potential side of the ramp, in the "beam" region, an unstable electron beam is seen for roughly another 10 Debye lengths along B. The electron beam is rapidly stabilized by intense electrostatic waves and nonlinear structures interpreted as electron phase-space holes. The "wave" region is physically separated from the ramp by the beam region. Numerical simulations reproduce a similar ramp structure, beam region, electrostatic turbulence region and plasma characteristics as seen in the observations. These results suggest that large double layers can account for the parallel electric field in the downward current region and that intense electrostatic turbulence rapidly stabilizes the accelerated electron distributions. These results also demonstrate that parallel electric fields are directly associated with the generation of large-amplitude electron phase-space holes and plasma waves.

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