公开(公告)号：US3492531A

公开(公告)日：1970-01-27

申请号：US3492531D

申请日：1968-01-22

Applicant: FUJITSU LTD

Inventor： OWAKI KENICHI ,  NAKAYAMA NORIHIKO ,  IMAHORI YOSHIO

IPC: H01J3/02 ,  H01J11/04 ,  H01J13/48

CPC classification number: H01J3/029

公开(公告)号：DE1514091B1

公开(公告)日：1970-10-22

申请号：DE1514091

申请日：1965-06-25

Applicant: FUJITSU LTD

Inventor： OWAKI KENICHI ,  NAKAYAMA NORIHIKO ,  IMAHORI YOSHIO

IPC: H01J3/02 ,  H01J11/04

Abstract: 1,115,468. Electron guns. KOBE INDUSTRIES CORPORATION. 24 June, 1965 [27 June, 1964], No. 26897/65. Heading H1D. A crossed-field electron gun comprising longitudinal cathode 5, Fig. 2, anode 3 and low potential electrode 4 has the magnetic field H(x) varying in intensity as a function of distance x from the low potential electrode with the voltage and magnetic field conditions such that the electrons emitted from the cathode are converged on to a stable linear orbit 6. The magnetic field intensity may decrease from the electrode 4 towards the anode 3 or vice versa. The gun may be used in a cathode-ray tube and in the arrangement of Fig. 5 the gun 3, 4, 5 is located in a bent portion of the tube neck and the beam is deflected on to the main axis of the tube by a magnet 21 providing a non- uniform field distribution such as to ensure that the electrons are again guided into a stable linear orbit and the original ribbon beam converted into a fine electron beam. In another embodiment, the gun system is annular to produce a hollow electron beam. The gun may be utilized in velocity modulated tubes or electron accelerators.