Electron-beam generation in a wide-aperture open gas discharge: A comparative study for different inert gases

Bokhan, P. A.; Zakrevsky, Dm. E.
August 2010
Applied Physics Letters;8/30/2010, Vol. 97 Issue 9, p091502
Academic Journal
In the present study, electron-beam generation by open discharges was examined. The study was performed at gas pressures up to 20 Torr, and covered all inert gases. At voltages up to 8 kV, electron-beam currents up to 1600 A with current density ∼130 A/cm2 and a beam generation efficiency in excess of 93% were obtained. The production of electrons from cold cathode was concluded to be of photoemissive nature, enabling the production of high-intensity electron beams in any noble gas or in a mixture of a noble gas with molecular gases irrespective of cathode material.


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