X-ray tube
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United States of America Patent
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Aug 22, 2017
Issued Date -
N/A
app pub date -
Oct 7, 2014
filing date -
Apr 12, 2012
priority date (Note) -
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Abstract
According to one embodiment, an X-ray tube includes an elongated anode target, a cathode, and a vacuum envelope. The cathode includes an electron emission source and a converging electrode including a trench portion. The trench portion includes a closest inner circumferential wall, an upper inner circumferential wall, and a lower inner circumferential wall. The electron emission source projects towards a opening of the trench portion from a boundary between the closest inner circumferential wall and the upper inner circumferential wall.
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