Nuclear Engineering and Technology

  • 제56권1호
  • /
  • Pages.70-77
  • /
  • 2024
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Development of a low energy ion irradiation system for erosion test of first mirror in fusion devices

  • 투고 : 2023.08.21
  • 심사 : 2023.09.07
  • 발행 : 2024.01.25
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⟨ 이전 논문 다음 논문 ⟩

초록

A low energy ion irradiation system based on the deuterium arc ion source with a high perveance of 1 µP for a single extraction aperture has been successfully developed for the investigation of ion irradiation on plasma-facing components including the first mirror of plasma optical diagnostics system. Under the optimum operating condition for mirror testing, the ion source has a beam energy of 200 eV and a current density of 3.7 mA/cm2. The ion source comprises a magnetic cusp-type plasma source, an extraction system, a target system with a Faraday cup, and a power supply control system to ensure stable long time operation. Operation parameters of plasma source such as pressure, filament current, and arc power with D2 discharge gas were optimized for beam extraction by measuring plasma parameters with a Langmuir probe. The diode electrode extraction system was designed by IGUN simulation to optimize for 1 µP perveance. It was successfully demonstrated that the ion beam current of ~4 mA can be extracted through the 10 mm aperture from the developed ion source. The target system with the Faraday cup is also developed to measure the beam current. With the assistance of the power control system, ion beams are extracted while maintaining a consistent arc power for more than 10 min of continuous operation.

키워드

과제정보

This research was supported by KAERI Institutional Program (Project No.524410-23), national R&D program through the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (2020M2D1A1064180), and by Ministry of Science and ICT of Korea, through the ITER project Contract (RS-2022-00154842). The views and opinions expressed herein do not necessarily reflect those of the ITER organization.

참고문헌

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