US 7,544,951 B2
Electron gun assembly
Rodney Kendall, Ridgefield, Conn. (US); and Tomohiko Abe, Tokyo (Japan)
Assigned to NuFlare Technology, Inc., Shizuaka-ken (Japan)
Filed on Jul. 31, 2006, as Appl. No. 11/495,628.
Prior Publication US 2008/0023642 A1, Jan. 31, 2008
Int. Cl. G21K 1/08 (2006.01); H01J 3/14 (2006.01); H01J 3/26 (2006.01); H01J 49/42 (2006.01)
U.S. Cl. 250—396R  [250/310; 250/311; 250/492.1; 250/492.2; 250/492.22; 250/492.3; 313/310; 313/341; 313/343; 313/336; 313/413; 313/414; 313/442; 313/433; 313/443; 315/106; 315/107; 315/383; 315/360; 315/307] 29 Claims
OG exemplary drawing
 
1. A rotatable structure for use in an electron beam system, comprising:
a first portion having a generally circular cross section about a first rotation axis and including a first mating end and a first outer end at opposite ends of the first portion;
a second portion having a generally circular cross section about a second rotation axis and including a second mating end and second outer end at opposite ends of the second portion;
each of the first and second outer ends including an annular protrusion;
the first and second mating ends having substantially a same inside diameter and substantially a same outside diameter and including depressions evenly spaced therealong;
wherein upon joining the first and second mating ends such that the first and second rotation axes align, and corresponding depressions in the first and second mating ends align, the aligned depressions define openings each adapted to receive an electron source.