X-ray tube
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United States of America Patent
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Jun 24, 2014
Grant Date -
Aug 16, 2012
app pub date -
Apr 27, 2012
filing date -
Oct 30, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An X-ray tube has a cathode, an anode target to emit X-rays, and a vacuum envelope which houses the cathode and the anode target. The vacuum envelope has a first metal member connected to the anode target, a second metal member which is connected to the first metal member and has a coefficient of thermal expansion lower than that of the first metal member, and an electrically insulating annular ceramic member connected to the second metal member and the cathode. In addition, the X-ray tube has a cooling system which is connected to the first metal member and forms a cooling passage. Furthermore, the X-ray tube has an adapter which is in contact with the first metal member, surrounds the second metal member and has a thermal conductivity higher than that of the second metal member, and a heat-transfer medium placed between the ceramic member and the adapter.
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