X-ray source

Details X-ray source X-ray source

H - Electricity

01

J

313/23

H01J 35/02 (2006.01) H01J 35/00 (2006.01) H01J 35/04 (2006.01) H01S 4/00 (2006.01) H05G 2/00 (2006.01)

Patent

CA 1278017

ABSTRACT OF THE DISCLOSURE An X-ray source with a cathode formed as a cylindrical electrode having a hollow central anode tube on its axis, with a grid surrounding the anode and interposed between the anode and cathode. The central anode tube is hollow and filled with a working medium. A high negative voltage is applied to the cathode, but the flow of electrons to the anode is blocked by the grid which is held near cathode potential. After a space charge is created at the grid by electrons from the cathode, a very short pulse to ground is applied to one end of the grid, yielding a relativistic wave of potential which propagates along the axial length of the grid. This wave of potential releases the elec- trons from the cathode, which flow directly to the an- ode. The impingement of the electrons on the tubular anode produces X-rays from the interior surface of the anode tube. These X-rays, together with the impinging electrons, pump the working medium along the length of the anode, causing a population inversion leading to the release of coherent X-rays in a wave synchronized with the propagating grid potential which exits the structure at the far end of the anode. The X-ray source may consist of identical units coupled together in series to provide a high power X-ray beam, and may be configured in other than cylindrical shapes depend- ing on the output desired.

536525

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