Electron beam technology has been in focus since long due to wide variety of applications in research and industry. One of the important modes of e-beam production is through thermionic emission. Improvements and advancement in enhancing the capabilities of electron beam sources compatible with the task to be accomplished at a reduced cost are therefore necessary. We give an update of the recently developed and reported e-guns which are easy to fabricate, assemble and more efficient. Besides being cost effective, these guns are user friendly.
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