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Photoelectric x-ray tube

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TLDR
In this article, the average power capacity of a rotating-anode X-ray generator tube is limited by the slow radiation cooling of the anode, which can be removed by rotating the entire vacuum envelope (22") so the heat can be conducted directly to the air or to a circulating liquid.
Abstract
The average power capacity of a rotating-anode X-ray generator tube is limited by the slow radiation cooling of the anode. The invention removes this limitation by rotating the entire vacuum envelope (22') so the heat can be conducted directly to the air or to a circulating liquid. The cathode (33) and anode (36') are made as figures of revolution about the axis. A stationary source of X-rays is produced by focusing a stationary spot of light (32') onto a rotating photocathode (33). The photoelectrons (34') are drawn off and focused onto a stationary spot on the rotating anode, to provide a stationary source of X-rays (40').

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References
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Patent

Rotating anode x-ray source and cooling technique therefor

TL;DR: In this paper, a rotating anode x-ray source with means by which to efficiently cool the electron beam target surface of the source was described. But the authors did not specify the cooling technique used.
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Rotating anode X-ray tube for tomodensitometers

TL;DR: In this paper, a hollow cylindrical, rotating anode, X-ray tube for tomodensitometers is described, which is swept on its inner surface by an electron beam and produces in cooperation with a collimation device having several openings, which are roughly parallel and coplanar.
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Light controlled x-ray scanner

TL;DR: A light controlled X-ray scanner with a source of X-rays which includes parallelly oriented ring cathodes and anodes located within an annular evacuated closure is described in this paper.
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TL;DR: In this paper, an extended radiating aperture for X-rays is provided by means of a stationary target of an X-ray emissive metal positioned for uniform illumination by high speed electrons emanating from a cathode and accelerating through a difference of potential between the cathodes and the target.
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X-ray apparatus

TL;DR: In this article, the present invention relates to X-ray apparatus which is constructed to be capable of sustained and powerful output of X-rays for diagnostic, crystallographic, industrial or other purposes In such apparatus it is necessary to provide against excessive heating of the target area which may