Investigation of the plasma edge cathode

Author

Grothaus, M.G. ; Buraczyk, D.E. ; Zieher, K.W.

Author_Institution

Dept. of Electr. Eng., Texas Tech Univ., Lubbock, TX, USA

fYear

1990

fDate

2-5 July 1990

Firstpage

946

Lastpage

951

Abstract

A plasma cathode for high current density electron extraction is investigated. The electrons are extracted transversely to the flow of a plasma jet for several microseconds without significant gap closure. The maximum extractable current density is given by the density and the electron temperature of the plasma jet. The composition of the plasma jet is analyzed by a time-of-flight method. The geometry of the electron beam is investigated by a multiple pin hole imaging method. This yields the intrinsic divergence of the electron beam and the shape of the effective plasma boundary.

Keywords

Langmuir probes; cathodes; electron beams; plasma boundary layers; plasma density; plasma jets; plasma sources; plasma temperature; plasma transport processes; effective plasma boundary; electron beam geometry; electron beam intrinsic divergence; electron temperature; gap closure; high current density electron extraction; maximum extractable current density; multiple pin hole imaging method; plasma edge cathode; plasma jet composition; plasma jet flow; time-of-flight method; Anodes; Cathodes; Current density; Electron beams; Ions; Plasmas; Sparks;

fLanguage

English

Publisher

ieee

Conference_Titel

High-Power Particle Beams, 1990 8th International Conference on

Conference_Location

Novosibirsk

Print_ISBN

9.7898102055e+012

Type

conf

Filename

6396384