| 摘要 |
2067339 9203837 PCTABS00011 An X-ray tube for greatly enhancing the output of photons relative to a standard tube includes a source (10) of an electron beam focused on a target (22) at an angle of approximately 10· to produce high energy photons emitted at an angle along their centerline of 5· to 15·, both angles referring to the surface of the target. Reduction of impingement of scattered electrons on the tube window is affected in various ways such as use of a magnet (48) to deflect electrons from the photon stream or locating the window out of alignment with the most intense scattered electrons. Scattered electrons are also absorbed by an essentially zero albedo shield (54) disposed in the path of the majority of the scattered electrons not directed at the window.
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