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A compact low-energy electron beam irradiator.

Sun Oh Cho1, Min Kim, Byung Cheol Lee

  • 1Laboratory for Quantum Optics, Korea Atomic Energy Research Institute, Yusong, Taejon, South Korea. socho@kaeri.re.kr

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|May 8, 2002
PubMed
Summary

A novel compact low-energy electron beam irradiator was developed for air applications. This system efficiently extracts electron beams up to 80 keV through a specialized foil window.

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Area of Science:

  • Applied Physics
  • Materials Science
  • Vacuum Technology

Background:

  • Development of compact electron beam systems for atmospheric applications is crucial.
  • Existing low-energy electron sources often face challenges with beam extraction into air.

Purpose of the Study:

  • To develop and characterize a new compact low-energy electron beam irradiator.
  • To enable efficient electron beam delivery into air for various applications.

Main Methods:

  • Utilized a thermionic LaB6 cathode for electron generation in vacuum.
  • Designed a specialized irradiation port with a 4.8 micrometer havar foil window.
  • Implemented a controlled bow geometry and vortex tube cooling for window integrity.
  • Measured electron beam current extraction into air at variable energies (35-80 keV).

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Main Results:

  • The irradiator generates electron beams from 35 to 80 keV with up to 1 mA current.
  • Achieved efficient extraction of approximately 60% of the beam current into air at 80 keV.
  • The havar foil window with controlled geometry and cooling effectively withstood vacuum pressure and beam energy dissipation.

Conclusions:

  • The developed compact low-energy electron beam irradiator is capable of delivering electron beams into air.
  • The specialized window design and cooling system ensure stable operation.
  • This technology opens possibilities for new applications requiring low-energy electron beams in atmospheric conditions.