File:The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14570852048).jpg

Identifier: americanjournroen07ameruoft (find matches)
Title: The American journal of roentgenology, radium therapy and nuclear medicine
Year: 1906 (1900s)
Authors: American Radium Society American Roentgen Ray Society
Subjects: Radiotherapy X-rays
Publisher: Springfield, Ill. C.C. Thomas
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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rlier forms of .^r-ray ap-paratus, would in general have renderedthem bulky and, mechanically, relativelyinflexible. With the advent of a self-rectifying .i--raytube, which is stable and can be made verysmall, it became interesting to mount the.r-ray tube inside of the transformer tankand in the same oil with the transformer.The following consists of a description of asmall experimental model of such an outfit,together with a discussion of some of thepossible modifications and a summary of theinherent advantages and limitations of themethod. i«i Oil-Immersed A-Rav Generatingf Outfits 4, are provided at the bottom, and the bal-ance of the tank is completely filled withoil. (One of the oil-exi)ansion chambers, 5,is also seen in Fig. 3.) The tank is of metal, and the cover, 3. isof bakelite. A thin layer of aluminum maybe mounted on top of this and metallicallyconnected to the tank. If then the tank isconnected to earth, the whole high tensionsvstem is inside of an earthed metal enclos-
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Fic. I. ure from which nothing but .r-rays canemerge. The high-tension danger is thenseen to be completely eliminated. The generating outfit, as shown in Fig. 3.is suitable for 10 milliamperes at 60000 volts(useful), and weighs 54 pounds. Lightweight is of course desirable to promote easein handling. Furthermore, the weight of thegenerating outfit determines the weight andbulk of the supporting stand. 2. The Traiisfonucr.—The transformeris made as small as is consistent with thesatisfactory operation of a tube rectifying its own current and carrying the above men-tioned load. 3. The Tube.—As the bulk of the metaltank which is to contain the transformer andtube is partly dependent on the size of thelatter, it becomes desirable that the tube shallbe small. There is also another reason forthis, for the smaller the bulb and the shorterthe anode arm, the shorter will be the heatpath from the focal spot to the outside cool-ing medium, and, hence, the more effectivewill be the cooling of

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