Skip to main content
SpringerLink
Log in

Development of a plasma control system for steady-state operation on QUEST

  • Published:
Journal of the Korean Physical Society Aims and scope Submit manuscript

    We’re sorry, something doesn't seem to be working properly.

    Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Abstract

A drift error correction technique with machine vision and a real-time equilibrium calculation code have been developed on the QUEST (Q-shu university experiment with the steady-state spherical tokamak) for steady-state operation. The drift error caused by the long time-integration of magnetic raw signals has to be removed. With a captured image of the plasma’s cross section, the plasma’s position is identified by use of image filters. The measured magnetic flux values are corrected to the calculated flux values estimated by using this plasma position. The correction with the captured image work as expected in the preliminary result using a flashlight instead of a plasma.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. K. Hanada, K. Sato, H. Zushi, K. Nakamura, M. Sakamoto, H. Idei, M. Hasegawa and QUEST Project Team, Plasma and Fusion Research 5, S1007 (2010).

    Article  ADS  Google Scholar 

  2. D. M. Liu, B. N. Wan, Y. Wan, Y. C. Wu, B. Shen, Z. S. Ji and J. R. Ruo, Rev. Sci. Instrum. 80, 053506 (2009).

    Article  ADS  Google Scholar 

  3. J. G. Bak, S. G. Lee, KSTAR Project Team and DeRac Son, Rev. Sci. Instrum. 75, 4305 (2004).

    Article  ADS  Google Scholar 

  4. Y. Kawamata, I. Yonekawa and K. Kurihara, Proceedings of the 19th IEEE/IPSS Symposium on Fusion Engineering (Atlantic City, 2002), p. 172.

    Google Scholar 

  5. D. A. Gates, J. R. Ferron, M. Bell, T. Gibney, R. Johnson, R. J. Marsala, D. Mastrovito, J. E. Menard, D. Mueller, B. Penaflor, S. A. Sabbagh and T. Stevenson, Nucl. Fusion 46, 17 (2006).

    Article  ADS  Google Scholar 

  6. H. Wang, J. Luo, Q. Huang, Plasma Sci. Technol. 6, 2390 (2004).

    Article  ADS  Google Scholar 

  7. M. Hasegawa, K. Nakamura, H. Zushi, K. Hanada, A. Fujisawa, K. Matsuoka, O. Mitarai, H. Idei, Y. Nagashima, K. Tokunaga, S. Kawasaki, H. Nakashima, A. Higashijima, Fusion Eng. Design 88, 1074 (2013).

    Article  Google Scholar 

  8. J. R. Ferron, M. L. Walker, L. L. Lao, H. E. ST. John, D. A. Humphreys, J. A. Leuer, Nucl. Fusion 38, 1055 (1998).

    Article  ADS  Google Scholar 

  9. M. Hasegawa, K. Nakamura, K. Tokunaga, H. Zushi, K. Hanada, A. Fujisawa, H. Idei, S. Kawasaki, H. Nakashima, A. Higashijima, IEEJ Trans. Fundam. Mater. 132, 477 (2012).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan

    Makoto Hasegwa, Kazuo Nakamura, Hideki Zushi, Kazuaki Hanada, Akihide Fujisawa, Keisuke Matsuoka, Hiroshi Idei, Yoshihiko Nagashima, Kazutoshi Tokunaga, Shoji Kawasaki, Hisatoshi Nakashima & Aki Higashijima

Authors
  1. Makoto Hasegwa
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kazuo Nakamura
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Hideki Zushi
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Kazuaki Hanada
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Akihide Fujisawa
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Keisuke Matsuoka
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Hiroshi Idei
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. Yoshihiko Nagashima
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. Kazutoshi Tokunaga
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. Shoji Kawasaki
    View author publications

    You can also search for this author in PubMed Google Scholar

  11. Hisatoshi Nakashima
    View author publications

    You can also search for this author in PubMed Google Scholar

  12. Aki Higashijima
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Makoto Hasegwa.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Hasegwa, M., Nakamura, K., Zushi, H. et al. Development of a plasma control system for steady-state operation on QUEST. Journal of the Korean Physical Society 65, 1191–1195 (2014). https://doi.org/10.3938/jkps.65.1191

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.3938/jkps.65.1191

Keywords

Search

Navigation