Title :
P4-22: Electrostatic focusing of electrons off a large-area reticulated vitreous carbon (RVC) field emission source
Author :
Smith, Brady C. ; Hunt, Charles E. ; Brodie, Ivor
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, Davis, CA, USA
Abstract :
An electrostatic- focused electron source with an Ar+-ion irradiated reticulated vitreous carbon (RVC) field-emission cathode is designed and simulated. The electron beam from a 1 mm emissive surface is focused to a 30 μm diameter spot, retaining low energy spread and high brightness, yet high total current, for application to phase-contrast x-ray imaging.
Keywords :
X-ray imaging; argon; carbon; cathodes; electron beams; electron field emission; electrostatics; vitreous state; electron beam; electrostatic- focused electron source; emissive surface; field emission source; field-emission cathode; large-area reticulated vitreous carbon; phase-contrast X-ray imaging; Argon; Brightness; Carbon dioxide; Cathodes; Electron beams; Electron emission; Electron sources; Electrostatics; Focusing; X-ray imaging; RVC; electron gun; field emission cathode; phase contrast imaging; reticulated vitreous carbon;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2010 IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-7098-3
DOI :
10.1109/IVELEC.2010.5503471
