Patent ID: 8698097
Filing Date: 2014-04-15
Classification: B01J,G21K,H01J

Abstract:
1. An irradiation system for treating a flowing contaminated media using a geometry of radially inwardly directed energetic electrons, comprising an electron beam generator including a thermionic cathode comprising a cold cathode emitter having a cold electron emitting surface mounted inside an electrically grounded first cylinder having a first diameter and electrically insulated from said first cylinder, an electrically grounded second cylinder having a second diameter smaller than said first diameter inside and coaxial with said first cylinder, said second cylinder including windows comprising a material to pass said electrons with minimal absorption and reflection, and a voltage source to apply a negative voltage between said cathode and said second cylinder to generate said electrons, and focusing elements comprising a focus grid positioned with respect to said cold cathode emitter to prevent scatter of said electrons and radially inwardly direct said electrons emitted from said cold cathode emitter through said windows into the interior of said second cylinder to irradiate said flowing media.