 | Electronic journals - 1913 - 530 pages
...In modern X-ray practice powerful electrical apparatus is used to excite the tube. The greater part of the energy delivered to the tube is transformed...into heat at the point where the cathode rays bombard a metallic target. Where platinum is used, which melts at 1780°C, it has been found necessary, in... | |
 | Isaac W. Litchfield - Science - 1911 - 172 pages
...In modern X-ray practice powerful electrical apparatus is used to excite the tube. The greater part of the energy delivered to the tube is transformed...into heat at the point where the cathode rays bombard a metallic target. Where platinum is used, which melts at 1755 degrees centigrade, it has been found... | |
 | General Electric Co - 1919 - 318 pages
...running sometimes to a capacity of 10 and even 15 kilowatts, is used to excite the tube. The greater part of the energy delivered to the tube is transformed...it has been found necessary, to prevent melting, to p'ace the target beyond the focus of the cathode so as to spread the bombardment over a larger area.... | |
 | Edward Trevert, Arthur Eugene Watson - Amateur radio stations - 1912 - 612 pages
...modern Rontgen-ray practice, powerful apparatus, running sometimes to a capacity of 10, and even 15 kw, is used to excite the tube. A considerable part (perhaps...radiograph is a shadow picture, and as the source of the Rontgen ray is the bombarded area of the target, this enlarging of that area is clearly an undesirable... | |
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A considerable part (perhaps as much as onethird) of the energy delivered to the tube is transformed into heat at the point where the cathode rays bombard the target. Where platinum is used it has been found necessary, to prevent melting, to place the... 