公开(公告)号：GB2602129A

公开(公告)日：2022-06-22

申请号：GB202020184

申请日：2020-12-18

Applicant: UNIV OF LANCASTER

Inventor： CLAUDIO PAOLINI ,  NICOLAS PAUL RENNINSON ,  RUPA BASU ,  JEEVAN MAHADEV RAO ,  ROSA LETIZIA

IPC: H01J23/06 ,  H01J1/92 ,  H01J23/04 ,  H01J23/12 ,  H01J25/34

Abstract: An electron gun 100 is disclosed for use in an apparatus, such as a TWT, having a body 210 along which a beam of electrons emitted by the electron gun 100 travels during use. The electron gun 100 comprises a housing for forming a vacuum seal with the body 210 of the apparatus, a cathode assembly (160, Fig. 2) within the housing for generating electrons, an anode 110 towards which the electrons are accelerated and a hole in the anode 110 to permit the accelerated electrons to pass into the body 210 of the apparatus. The housing serves as the anode (160) of the electron gun 100 and an insulator lining at least part of the housing wall is provided to shield the housing electrically from the cathode assembly (160). Forming the anode as part of the evacuated body of the apparatus reduces the number of required fabrication steps.