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Title:
ELECTRON BEAM EMITTER WITH INCREASED ELECTRON TRANSMISSION EFFICIENCY
Document Type and Number:
WIPO Patent Application WO/2016/042688
Kind Code:
A1
Abstract:
An electron beam emitter comprises an electron emission source capable of emitting electrons; a vacuum chamber containing the electron emission source; and a transmission window that keeps airtightness of the vacuum chamber and is capable of transmitting the electrons from the electron emission source. The transmission window includes a foil that transmits the electrons and a grid that does not transmit the electrons. The electron emission source includes an emission portion that emits the electrons and a non-emission portion that does not emit the electrons. The emission portion has a lower work function than the non-emission portion. The non-emission portion is prepared so as to prevent the electrons from reaching the grid.

Inventors:
BAKHTARI KAVEH
Application Number:
PCT/JP2015/002321
Publication Date:
March 24, 2016
Filing Date:
May 07, 2015
Export Citation:
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Assignee:
HITACHI SHIPBUILDING ENG CO (JP)
International Classes:
H01J1/16; H01J33/00
Foreign References:
US4873468A1989-10-10
US20040183032A12004-09-23
US20070278928A12007-12-06
US3967150A1976-06-29
US4499405A1985-02-12
US8339024B22012-12-25
Attorney, Agent or Firm:
MORIMOTO INT'L PATENT OFFICE (4-1 Nishi-Honmachi 1-chome, Nishi-ku, Osaka-sh, Osaka 05, JP)
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