X-ray or gamma ray systems or devices – Source – Electron tube
Reexamination Certificate
2005-02-01
2005-02-01
Bruce, David V. (Department: 2882)
X-ray or gamma ray systems or devices
Source
Electron tube
C378S119000
Reexamination Certificate
active
06850595
ABSTRACT:
An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A/cm2. High energy conversion efficiency and compact design are achieved due to easy focusing of cold cathode emitted electrons and dramatic reduction of heating at the anode. In addition, by pulsing the field between the cathode and the gate or anode and focusing the electron beams at different anode materials, pulsed x-ray radiation with varying energy can be generated from a single device.
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Lu Jianping
Zhou Otto Z.
Bruce David V.
Song Hoon
The University of North Carolina at Chapel Hill
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