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Method and apparatus for controlling electron beam current

  • US 20060274889A1
  • Filed: 05/02/2006
  • Published: 12/07/2006
  • Est. Priority Date: 10/06/2000
  • Status: Abandoned Application
First Claim
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1. An x-ray generating device comprising:

  • a. a chamber;

    b. a field emission cathode, comprising a film comprising carbon nanotube-containing materials on a conducting substrate;

    c. an anode target;

    d. a gate electrode comprising a metal grid, wherein the grid is placed between the cathode and the anode; and

    e. a power supply structure to place the gate electrode at a higher electrical potential than the cathode for extracting the electrons from cathode, and to establish a large electrical potential difference between the cathode and the anode for generating the x-ray radiations.

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