Patent ID: 6396899
Filing Date: 2002-05-28
Classification: G01N

Abstract:
A secondary target device for transferring primary X-rays generated at a primary X-ray source to a sample as secondary X-rays, comprising:a target main body including a plurality of target members having target surfaces facing a central axis linking between the primary X-ray source and the sample, and secondary target materials formed on the target surfaces, said plurality of target members being disposed concentrically with respect to the central axis to be spaced apart from each other, each of the target members having a length in a direction along the central axis and a disposition interval relative to a target member adjacent thereto to satisfy a first condition for allowing the primary X-rays to enter the target surface and a second condition for allowing the secondary X-rays generated at the target members by incidence of the primary X-rays to enter the sample, and an X-ray blocking member disposed on the central axis for blocking an irradiation of the primary X-rays from the primary X-ray source to the sample.