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Focusing Effect in Concave Cathode Model Using Computer Simulation

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2 Author(s)
Hae Young Choi ; Electrofusion Technol. Res. Div., Korea Electrotechnol. Res. Inst., Ansan ; Jong Uk Kim

It is well known that carbon nanotube (CNT) is an excellent electron field emitter. Because of its merits, CNTs have been applied recently for X-ray source for imaging. In X-ray imaging, both the emission current and the spot size of the electron beam are crucial. To fulfill these, a concave cathode structure is proposed as an alternative, and the simulation results based on the trajectories of time of flight of the electron beam are presented.

Published in:

Plasma Science, IEEE Transactions on  (Volume:36 ,  Issue: 4 )

Date of Publication:

Aug. 2008

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