H - Electricity – 01 – S
Patent
H - Electricity
01
S
358/26, 345/34
H01S 3/00 (2006.01) H01J 33/04 (2006.01) H01S 3/09 (2006.01)
Patent
CA 1150862
APPARATUS FOR PROVIDING IMPROVED CHARACTERISTICS OF A BROAD AREA ELECTRON BEAM ABSTRACT OF THE DISCLOSURE An electron beam device having a vacuum chamber in which an electron beam generator generates a directed stream of electrons. An electron beam window comprising a foil which seals the vacuum chamber is in the path of the stream of electrons and permits passage of the stream of electrons into a working region exterior of the chamber and adjacent the electron beam window. An electrode is positioned closely adjacent the foil and a second electrode is spaced from the foil to form an elongated working or, in the case of a laser, a lasing region between them. The electrodes are maintained at a high electrical potential which, along with the electron beam, molecularly excites a gaseous working medium between the electrodes. The in- cluded angle of electrons passing through and scattered by the foil is limited and the electron beam confined to a desired region by an external shield or bezel overlying the foil. The bezel is provided with a series of openings which may be in the form of holes or slots of predetermined depth, size and spacing one from another to provide the electrons emerging from the foil with a desired included angle of emergence while maintaining losses at a minimum.
372489
Avco Everett Research Laboratory Inc.
Hewitt Neville S.
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