X-ray analysis apparatus, especially computer tomography apparatus and X-ray target and collimator therefor
First Claim
1. An X-ray analysis apparatus comprising(a) a charged particle beam generator having a vacuum chamber and means in said vacuum chamber for generating a charged particle beam,(b) an X-ray generating target located outside said vacuum chamber, said target having a first surface which is bombarded by said charged particle beam and a second surface which is opposite said first surface, said target comprising at least one portion of target material exposed at both said first surface and said second surface and which emits X-rays when said first surface is bombarded by said charged particle beam, said at least one portion having a narrow width relative to a width of said target and being arranged in said target as a non-circular track, and(c) a detector for X-rays emitted by said target and transmitted through a test piece located between said target and said detector.
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Accused Products
Abstract
An X-ray analysis apparatus has a charged particle beam generator, an X-ray generating target bombarded by the beam and a detector for X-rays from said target transmitted by a test piece. To improve the spatial resolution of the apparatus, the beam size is reduced at the target by locating the target outside a vacuum chamber of the beam generator by providing the target as a non-circular narrow track of X-ray generating material exposed at both surfaces of the target, and by providing the beam generator with a beam accelerator and means for reducing the beam diameter between the beam accelerator and the target.
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Citations
24 Claims
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1. An X-ray analysis apparatus comprising
(a) a charged particle beam generator having a vacuum chamber and means in said vacuum chamber for generating a charged particle beam, (b) an X-ray generating target located outside said vacuum chamber, said target having a first surface which is bombarded by said charged particle beam and a second surface which is opposite said first surface, said target comprising at least one portion of target material exposed at both said first surface and said second surface and which emits X-rays when said first surface is bombarded by said charged particle beam, said at least one portion having a narrow width relative to a width of said target and being arranged in said target as a non-circular track, and (c) a detector for X-rays emitted by said target and transmitted through a test piece located between said target and said detector.
- 14. A target for X-ray generating apparatus adapted to be bombarded by an energy beam and having a first side at which said energy beam is incoming and opposite said first side a second side at which X-rays are emitted when said first side is bombarded by said incoming energy beam, said target including at least one wire supported in the target and at least partly consisting of X-ray generating material and being exposed at both said first side and said second side of said target.
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16. An X-ray analysis apparatus comprising
(a) a charged particle beam generator for generating a charged particle beam, (b) an X-ray generating target having a first surface which is bombarded by said charged particle beam and a second surface opposite said first surface, said target comprising at least one portion of target material exposed at both said first surface and said second surface and adopted to emit X-rays at said second surface when said portion exposed at said first surface is bombarded by said beam, said portion as seen looking onto said first surface, having a narrow width relative to the width of sad target and being arranged in said target as a non-circular track, and (c) a detector for X-rays emitted by said target from said second surface thereof and transmitted through a test piece located between said target and said detector.
- 22. A target for X-ray generating apparatus adapted to bombarded by an energy beam and having a first side at which said energy beam is incoming and opposite said first side a second side at which X-rays are emitted, said target having an element made of X-ray generating material exposed at both said first side and said second side of the target, said element having a narrow elongate shape and being arranged in said target as a non-circular track.
Specification