Patent ID: 6700127
Filing Date: 2004-03-02
Classification: B82Y,H01J,Y10S

Abstract:
An apparatus for producing an electron beam, comprising a first cylindrical vacuum chamber with a proximal end and a distal end, a source of electron beams disposed within said first cylindrical vacuum chamber, and first means for focusing said electrons beams, wherein:(a) said distal end of said first cylindrical vacuum chamber comprises an electron transparent thin wall of material, (b) said first cylindrical vacuum chamber has a volume of less than about 1 cubic millimeter, (c) the pressure within said first cylindrical vacuum chamber is from about 10âˆ’8 to about 10âˆ’10 Torr, (d) said first means for focusing said electron beams are disposed outside of said first cylindrical vacuum chamber, and wherein, with the exception of said source of electron beams, no other electrical component is disposed within said first cylindrical vacuum chamber, and (e) said first cylindrical vacuum chamber is a carbon nanotube vacuum chamber.