X-ray or gamma ray systems or devices – Source support – Source cooling
Reexamination Certificate
2007-03-06
2007-03-06
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Source support
Source cooling
C378S199000
Reexamination Certificate
active
10467944
ABSTRACT:
An x-ray tube and method of operating include a vacuum chamber vessel and a source of an electron beam inside the vacuum chamber vessel. A target disposed inside the vacuum chamber vessel includes a substrate and one or more deposits attached to the substrate. Each different deposit includes an atomic element having a different atomic number. The x-ray tube also includes a means for directing the electron beam to a selectable deposit of multiple deposits. The substrate material can be selected with better vacuum sustaining strength, x-ray transparency, melting point, and thermal conductivity than a deposit. The substrate may be cooled by an integrated cooling system. The x-ray tube allows a selectable x-ray frequency to be produced with enhanced economy of power, reduced moving parts, and reduced size. For improved bone mass applications, one of the deposits has a k-fluorescence energy less than about 53 thousand electron volts.
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Beck Thomas J.
Charles, Jr. Harry K.
Cooch Francis A.
Glick Edward J.
Kiknadze Irakli
The Johns Hopkins University
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