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Boron vacuum-arc ion source with LaB6 cathode.

Vasily Gushenets1, Alexey Bugaev2, Efim Oks1

  • 1Institute of High Current Electronics, Siberian Branch of the Russian Academy of Science, Tomsk 634055, Russia.

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Summary
This summary is machine-generated.

A novel pulsed vacuum arc ion source using a lanthanum hexaboride cathode enables high-dose implantation of boron isotopes. This technology facilitates selective ion implantation for advanced material applications.

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Area of Science:

  • Physics
  • Materials Science
  • Ion Beam Technology

Background:

  • Ion implantation is crucial for modifying material properties.
  • High-dose implantation of specific isotopes, like boron-10 and boron-11, requires specialized ion sources.
  • Existing ion sources may face limitations in efficiency, selectivity, or operational longevity for such applications.

Purpose of the Study:

  • To develop and characterize a pulsed vacuum arc ion source for high-dose selective implantation of boron-10 and boron-11 isotopes.
  • To investigate the formation, transport, and magnetic separation of these ions.
  • To ensure reliable and long-term operation of the ion source.

Main Methods:

  • Utilized a pulsed vacuum arc discharge with a lanthanum hexaboride (LaB6) cathode.
  • Employed a flashover trigger system for initiating cathode spots on an alumina ceramic.
  • Integrated a mass analyzer magnet for isotopic separation of extracted ions.
  • Operated the plasma generator at a 10 Hz pulse repetition rate with a 280 µs pulse width.

Main Results:

  • Achieved a stable ion beam with a rectangular cross-section (0.6 × 6 cm²) at 25 keV energy and up to 75 mA amplitude.
  • Demonstrated effective formation, transport, and magnetic separation of boron-10 and boron-11 ions.
  • The source design ensures uniform cathode erosion and long-term operational capability.
  • The trigger system and cathode dimensions contribute to reliable performance.

Conclusions:

  • The developed pulsed vacuum arc ion source with a LaB6 cathode is effective for high-dose selective implantation of boron isotopes.
  • The source parameters and design features support efficient ion generation, transport, and separation.
  • This technology offers a viable solution for applications requiring precise isotopic implantation.