Ion Beam Extraction by Discrete Ion Focusing

Eugen Stamate (Inventor)

Research output: Patent


An apparatus (900) and methods are disclosed for ion beam extraction. In an implementation, the apparatus includes a plasma source (or plasma) (802) and an ion extractor (804). The plasma source is adapted to generate ions and the ion extractor is immersed in the plasma source to extract a fraction of the generated ions. The ion extractor is surrounded by a space charge (810) formed at least in part by the extracted ions. The ion extractor includes a biased electrode (806) forming an interface with an insulator (808). The interface is customized to form a strongly curved potential distribution (812) in the space-charge surrounding the ion extractor. The strongly curved potential distribution focuses the extracted ions towards an opening (814) on a surface of the biased electrode thereby resulting in an ion beam.
Original languageEnglish
Patent numberWO2010040805
Filing date15/04/2010
Publication statusPublished - 2010

Bibliographical note

No.: EP2175469


  • Plasma processing
  • Fusion energy


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