Optimization of the hairpin-source electron gun using EGUN

We present a comparison of the experimental and simulated results of the thermionic hairpin-source, electron beam assembly using the SLAC electron beam trajectory program (EGUN). The gun was optimized for maximum emission current density and beam convergence in the post anode region. Therefore, by o...

Full description

Saved in:
Bibliographic Details
Published in:Vacuum 2014-03, Vol.101, p.157-162
Main Authors: Iqbal, Munawar, ul Islam, Ghalib, Saleem, Safa, Herrmannsfeldt, W.B.
Format: Article
Language:English
Subjects:
Assembly
Beam convergence
Beams (radiation)
Convergence
Current density
Density
EGUN
Electron beams
Emission
Emission density
Optimization
Power density
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a comparison of the experimental and simulated results of the thermionic hairpin-source, electron beam assembly using the SLAC electron beam trajectory program (EGUN). The gun was optimized for maximum emission current density and beam convergence in the post anode region. Therefore, by optimizing different parameters, an emission current density of 32 A/cm2 with maximum beam convergence of 0.9 mm was obtained. This corresponds to a power density of 3.29 × 105 W/cm2 at the focus point. As this was accomplished without the aid of magnetic focusing, the assembly was much simplified. The gun can now be used for electron devices and accelerator technology which require high current and power densities. •Optimization of an in-house hairpin-source electron gun.•Achieved: 3 × 105 W/cm2 power density at the target.•Good agreement between experiment and simulations results.•Gun is simple without any magnetic and extra electrostatic focusing.
ISSN:0042-207X
1879-2715
DOI:10.1016/j.vacuum.2013.08.005