Patent ID: 7932477
Filing Date: 2011-04-26
Classification: B82Y,H01J,H05B,Y10S

Abstract:
1. An electron beam heating system comprising: a cathode; an anode; and a carbon nanotube string, wherein the carbon nanotube string comprises an end portion and an emission portion, the end portion is in direct electrical contact with the cathode, the carbon nanotube string is composed of a plurality of carbon nanotube bundles packed closely, each of the carbon nanotube bundles comprises a plurality of carbon nanotubes, the carbon nanotubes are substantially parallel to each other and are joined by van der Waals attractive force, the emission portion comprises a plurality of carbon nanotube bundles forming a tooth-shaped structure; a chamber, wherein the cathode, the anode and the carbon nanotube string are located in the chamber.