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focal spot |
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focal spot [′fō·kəl ‚spät] (metallurgy) In electron-beam or laser welding, the spot where the beam has the highest concentrated energy level. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| High-Power transmission target has an interaction layer of tungsten and a special backing layer that provides improved heat transfer and lower focal spot temperature. Even at such high magnifications the latest 1000 x 1000 pixel detectors can easily resolve the resulting x-ray images, so image resolution depends almost entirely on focal spot size of the x-ray source. The lens system would be even more effective at longer wavelengths were it not for the spreading of the focal spot in the vertical direction due to gravity. |
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