Title :
Multicapillary and carbon fiber cathodes for high-current electron beam generation
Author :
Gleizer, J.Z. ; Vekselman, V. ; Hadas, Y. ; Gurovich, V.Ts. ; Krasik, Ya E.
Author_Institution :
Dept. of Phys., Technion - Israel Inst. of Technol., Haifa, Israel
fDate :
June 28 2009-July 2 2009
Abstract :
We report results of investigation of a high-current electron diode with multicapillary cordierite and glass cathodes assisted by velvet-type and ferroelectric plasma source igniters, and carbon fiber cathodes. Parameters of the plasma inside the capillary channels and in the vicinity of the cathode surface were studied during the accelerating pulse in a diode powered by a ~200 kV, ~300 ns pulse. The nature of uniformity in emission current density distribution and possibility of electron beam control duration for multicapillary cathode will also be presented. For carbon fiber cathodes it was found that application of the accelerating pulse leads to generation of the surface plasma in a form of several mm size plasma spots. The cathode plasma density and temperature were measured using non-disturbing spectroscopic methods.
Keywords :
carbon fibres; cathodes; current density; current distribution; electron beams; plasma density; plasma diodes; C; capillary channel; carbon fiber cathode; cathode plasma density; cathode plasma temperature; cathode surface; electron beam control duration; electron diode; emission current density distribution; ferroelectric plasma source igniter; glass cathode; high-current electron beam generation; multicapillary cathode; multicapillary cordierite; surface plasma; velvet-type plasma source igniters; Acceleration; Carbon dioxide; Cathodes; Diodes; Electron beams; Plasma accelerators; Plasma density; Plasma measurements; Plasma sources; Plasma temperature;
Conference_Titel :
Pulsed Power Conference, 2009. PPC '09. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-4064-1
Electronic_ISBN :
978-1-4244-4065-8
DOI :
10.1109/PPC.2009.5386337
