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Simulations of fusion edge plasmas by linear plasma devices: physics and plasma–material interactions

Journal of the Korean Physical Society volume 80, pages 717–734 (2022)Cite this article

Abstract

Because a fusion edge plasma contains various atomic and molecular processes, along with various plasma–material interactions (PMIs) for post-mortem analyses, a linear plasma device can simulate divertor and scrape-off layer (SOL) plasmas with DC edge relevant parameters, although it cannot generate a high ion temperature and toroidicity with much less power density compared to toroidal devices. The Divertor Plasma Simulator-2 (DiPS-2), a linear device with an LaB6 DC cathode, has been used for a few fusion-relevant physics experiments, including edge localized mode (ELM) simulation and edge transport of diffusion and convection. An ELM simulation has been performed by modulating the magnetic field relevant to the pressure modulation of a toroidal device, and the diffusion coefficients of free and bound presheaths have been measured in simulations of divertor or limiter transport. Moreover, the convection of the filament or the bubble expansion to the first wall has also been analyzed. In addition to various atomic and molecular processes in SOL and divertor plasmas, PMIs must be analyzed both on and beneath the surface of the plasma-facing components (PFCs) because of surface modification. Using DiPS-2 and other linear devices along with Korea Superconducting Tokamak Advanced Research (KSTAR), PMIs have been analyzed in terms of the following elements or processes: (1) boronizations, both for dust interactions with the surface chamber (DiSC) and KSTAR device, are analyzed; (2) carbon damage by the dense heat flux of DiPS-2 is experimentally investigated; (3) the density profile of the lithium injection gettering of hydrogen and its transport experiments (LIGHT-1) device is analytically calculated; (4) the effect of nitrogen on the relaxation of the heat flux to the divertor tile is experimentally analyzed; and (5) tungsten as the divertor tile material is analyzed via laser ELM simulations in terms of dust generation and surface modification.

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Acknowledgements

This research was supported by the National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2019M1A7A1A03088471). This research was partially supported by R&D Program of “Plasma Convergence and Fundamental Research (1711124796)” through the Korea Institute of Fusion Energy (KFE) funded by the Government funds, Republic of Korea.

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Authors and Affiliations

  1. Applied Plasma Laboratory, Department of Electrical Engineering, Hanyang University, Seoul, 04763, Korea

    In Je Kang, Min-Keun Bae, In Sun Park, Jeong-Sun Ahn, Doo-Hee Chang, Soon-Gook Cho, Geun-Sik Choi, Heung-Gyun Choi, Yong-Sup Choi, Bo-Hyun Chung, Jeong-Joon Do, Bon-Cheol Goo, Sung Hoon Hong, Jong-Sik Jeon, Sung-Kiu Joo, Seo Jin Jung, Seok-Won Jung, Yong Ho Jung, Beom-Sik Kim, Hye-Ran Kim, Jin-Hee Kim, Jong-Il Kim, Kyung-Cheol Kim, Myung Kyu Kim, Sang-You Kim, Jin-Woo Kim, Gyea Young Kwak, Dong-Han Lee, Min Ji Lee, Seung-Hwa Lee, Eun-Kyung Park, Dong Chan Seok, Byoung-Kyu Lee, Young-Jun Seo, Yun-Keun Shim, Jong Ho Sun, Byung-Hoon Oh, Hye Taek Oh, Young-Suk Oh, Sang Joon Park, Hyun Jong You, Hun Suk You & Kyu-Sun Chung

  2. Institute of Plasma Technology, Korea Institute of Fusion Energy, Gunsan, 54004, Korea

    Min-Keun Bae & Taihyeop Lho

  3. Agency for Defense Development, Daejeon, 34186, Korea

    Hyun-Jong Woo

  4. Department of Physics, Dong-A University, Busan, 49315, Korea

    Tae Hun Chung

  5. Korea Institute of Fusion Energy, Daejeon, 34133, Korea

    Suk-Ho Hong & Heung-Su Kim

  6. Department of Applied Physics, Hanyang University, Ansan, 15588, Korea

    Young-Dae Jung

  7. Department of Electrical Engineering, Hanyang University, Seoul, 04763, Korea

    Kwang-Cheol Ko

  8. Department of Energy Systems Engineering, Seoul National University, Seoul, 08826, Korea

    Gon-Ho Kim & Cha-Hwan Oh

  9. Department of Physics, Hanyang University, Seoul, 04763, Korea

    Jae Yong Kim & Myoung-Jae Lee

  10. Department of Nuclear Engineering, Hanyang University, Seoul, 04763, Korea

    Yong-Kyun Kim

  11. Department of Energy Engineering, Jeju National University, Jeju, 63243, Korea

    Heon-Ju Lee

  12. Department of Applied Physics, Dankook University, Yongin, 16890, Korea

    Seung Jeong Noh

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  1. In Je Kang
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Correspondence to Kyu-Sun Chung.

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Kang, I.J., Bae, MK., Park, I.S. et al. Simulations of fusion edge plasmas by linear plasma devices: physics and plasma–material interactions. J. Korean Phys. Soc. 80, 717–734 (2022). https://doi.org/10.1007/s40042-022-00397-y

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  • DOI: https://doi.org/10.1007/s40042-022-00397-y

Keywords

  • Linear plasma devices
  • DiPS-2
  • KSTAR
  • PMI (plasma–material interaction)
  • ELM (edge localized mode)
  • Diffusion
  • Convection