Patent ID: 8338796
Filing Date: 2012-12-25
Classification: H01J

Abstract:
1. An electron beam emitter comprising: an electron generator for generating electrons, the electron generator having a housing containing at least one elongate electron source for generating the electrons, the at least one elongate electron source having a width, the electron generator housing having an electron permeable region spaced from the at least one elongate electron source for allowing extraction of the electrons from the electron generator housing, the electron permeable region including a series of narrow elongate slots and ribs formed in the electron generator housing at an acute angle relative to the elongate electron source, the electron permeable region configured and positioned relative to the at least one elongate electron source for laterally spreading the electrons that are generated by the at least one elongate electron source such that the spread of the electrons exiting the electron permeable region is wider than the at least one elongate electron source.