Gridded Electron Guns and Modulation of Intense Beams

Gridded guns are useful for producing modulated electron beams. This modulation is generally limited to simple gating of the beam but may be used to apply structure to the beam pulse shape. In intense beams, this structure spawns space-charge waves whose dynamics depend in part on the relative stren...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2006-11, Vol.53 (11), p.2824-2829
Main Authors: Harris, J.R., O'Shea, P.G.
Format: Article
Language:English
Subjects:
Applied sciences
BEAM CURRENTS
Beams (radiation)
Density
ELECTRON BEAMS
ELECTRON GUNS
electron tubes
Electronic tubes, masers
Electronics
ENGINEERING
Exact sciences and technology
Gating and risering
Mathematical analysis
MODULATION
particle beams
Pulse shape
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
SHAPE
SPACE CHARGE
space-charge waves
Strength
Vacuum microelectronics
VELOCITY
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Summary:Gridded guns are useful for producing modulated electron beams. This modulation is generally limited to simple gating of the beam but may be used to apply structure to the beam pulse shape. In intense beams, this structure spawns space-charge waves whose dynamics depend in part on the relative strengths of the velocity and density variations which comprise the initial current modulation. In this paper, the strengths of beam current and velocity modulation produced in a gridded electron gun are calculated, and it is shown that under normal conditions, the initial modulation is dominated by density variation rather than velocity variation
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2006.883671