US 6,982,785 B2
Apparatus for determining radiation beam alignment
Gerrrit J. Van den Engh, 9756 49th Ave. Northeast, Seattle, Wash. 98195 (US)
Filed on May 01, 2001, as Appl. No. 9/847,466.
Prior Publication US 2002/0167656 A1, Nov. 14, 2002
Int. Cl. G01J 1/00 (2006.01)
U.S. Cl. 356—121 26 Claims
OG exemplary drawing
 
1. A radiation beam aligning apparatus, comprising:
(a) a flow chamber;
(b) a screen having a mirrored surface interrupted by one or more pin holes passing through said screen;
(c) a means for directing a radiation beam from said flow chamber to said screen; and
(d) a means for detecting said radiation beam reflected by said mirrored surface, wherein said detecting means determines a position of said radiation beam relative to said pin hole.