Characterization of multicapillary dielectric cathodes

Journal Article · Mon Apr 30 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2735544· OSTI ID:20971894

Gleizer, J Z; Hadas, Y; Yarmolich, D; Felsteiner, J; Krasik, Ya E ^[1]

---

1. Physics Department, Technion, 32000 Haifa (Israel)

Parameters of the plasma and electron beam produced by a multicapillary cathode in a diode powered by a {approx}200 kV, {approx}300 ns pulse are presented. It was found that the source of electrons is the plasma ejected from the capillaries. Inside the capillaries this plasma obtains electron density and temperature of {approx}8x10{sup 15} cm{sup -3} and {approx}5 eV, respectively. In the vicinity of the cathode, the density and temperature of the plasma electrons were found to be 2x10{sup 14} cm{sup -3} and 4.5 eV, respectively, for electron current density of {approx}40 A/cm{sup 2}. It was shown that the plasma expansion velocity is in the range of (1-2)x10{sup 6} cm/s for current density of >12 A/cm{sup 2}.

• OSTI ID: 20971894
• Journal Information: Applied Physics Letters, Vol. 90, Issue 18; Other Information: DOI: 10.1063/1.2735544; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM-PLASMA SYSTEMS
CAPILLARIES
CATHODES
CURRENT DENSITY
DIELECTRIC MATERIALS
ELECTRON BEAMS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
EV RANGE 01-10
ION TEMPERATURE
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA EXPANSION
PULSES
THERMIONIC DIODES