Experimental Study on Generation of Electron Beam Utilizing Cold Cathode in the Weakly Relativistic Energy Region

Author

Yambe, Kiyoyuki ; Ogura, Kanayo ; Hasegawa, Shun ; Shinada, Takuro ; Iwasaki, Takuya ; Furuichi, Tsubasa

Author_Institution

Niigata Univ., Niigata, Japan

Volume

41

Issue

10

fYear

2013

fDate

Oct. 2013

Firstpage

2781

Lastpage

2785

Abstract

Electron beam generation in a weakly relativistic region of less than 100 kV is investigated utilizing rectangular and disk cold cathodes made of copper. Electron emission areas are located on the edges of the cathodes. For uniform electron emission, some surface roughness is required on the emission surface, which is obtained by scratching the surface with sandpaper. A uniform sheet beam with a size of about 2 × 40 mm and an annular beam with a diameter of about 25 mm and a thickness of about 2 mm are demonstrated in the weakly relativistic region. Stable electron beams of sheet and annular shapes are experimentally demonstrated.

Keywords

cathodes; electron beams; electron emission; particle beam diagnostics; surface roughness; annular beam; annular shape; disk cold cathode; electron beam generation; electron emission areas; emission surface; rectangular cold cathode; sandpaper; stable electron beams; surface roughness; uniform electron emission; uniform sheet beam; weakly relativistic energy region; weakly relativistic region; Cathodes; Electron beams; Laser beams; Plasmas; Rough surfaces; Surface roughness; Cold cathode; electron beam; explosive emission; weakly relativistic region;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2013.2262505

Filename

6529210