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We developed a novel lithium magneto-optical trap ion source (MOTIS) that achieves record brightness and current. This advanced ion source enables high-resolution microscopy and ion implantation for materials science applications.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Materials Science
  • Surface Science

Background:

  • Laser-cooled ion sources offer new possibilities for microscopy and ion implantation.
  • Magneto-optical traps (MOTs) are crucial for laser cooling atoms.

Purpose of the Study:

  • To design and characterize a novel 7Li magneto-optical trap ion source (MOTIS).
  • To evaluate its performance against fundamental operating limits.
  • To enable advanced applications in surface microscopy and materials science.

Main Methods:

  • Development of a 7Li MOTIS.
  • Detailed characterization of ion beam properties, including brightness and continuous current.
  • Application of simple models to analyze performance.

Main Results:

  • Achieved a peak brightness of (1.2 ± 0.2) × 10^5 A m^-2 sr^-1 eV^-1.
  • Obtained a maximum continuous current exceeding 1 nA.
  • Demonstrated performance significantly surpassing previous Li MOTIS benchmarks.

Conclusions:

  • The developed Li MOTIS represents a significant advancement in ion source technology.
  • Its high performance supports applications in surface microscopy and nanostructure characterization.
  • The source is particularly suited for Li+ implantation in energy storage materials research.