Applied Science and Convergence Technology

한국진공학회 (The Korean Vacuum Society)
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Fabrication of Potassium Ion Source and its Emission Characteristics

  • Choi, Dae Sun (Department of Physics, Kangwon National University)
  • 투고 : 2016.10.04
  • 심사 : 2016.10.24
  • 발행 : 2016.11.30
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초록

In this study, we fabricated the $K^+$ ion source for the various purposes and investigated the emission characteristics. The fabricated $K^+$ ion source was painted in the tungsten filament to make filament type ion source. The RGA spectra show that the filament type $K^+$ ion source has a good out gassing character, so it can be used in the ultra-high vacuum system. The maximum $K^+$ ion current was 20 mA when filament temperature was 1410 K and filament potential was 50 V. When the filament temperature was 1070 K, the initial beam current was 50 mA and decreased only by 2% during 4 hours. The emitting energy was measured to be 2.04 eV. This low value means that the fabricated specimen is a good $K^+$ ion source. We conclude that this filament type ion source can be used in various fields, including the LEIS research.

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