X-ray or gamma ray systems or devices – Source – Electron tube
Reexamination Certificate
2005-04-26
2005-04-26
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Source
Electron tube
C378S109000, C378S113000, C378S121000
Reexamination Certificate
active
06885728
ABSTRACT:
A compact X-ray source is disclosed, improving controllability and insulation from unwanted high voltage effects. In one aspect, an active variable conductance device (130, 330) connected in series with the cathode is used in a closed loop, feedback arrangement to control the cathode beam current; the current flowing through the device to the cathode being directly sensed and compared with a desired current level. The result of the comparison is used to control the conductance of the device, thereby directly influencing the cathode current. A second aspect provides an extension of a Faraday cage, whereby the secondary winding of a transformer used to supply power to components within the cage is shielded within a coaxial, tubular member connected to the cage and extending outwardly from it.
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Crawley Alan Copeland
Hadland Roger
Haig Ian George
Keanly Paul Justin
Christie Parker and Hale, LLP
Glick Edward J.
Kao Chih-Cheng Glen
X-Tek Systems Limited
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