Advertisement

Physics of Atomic Nuclei

, Volume 78, Issue 14, pp 1677–1685 | Cite as

Development of a laser cleaning method for the first mirror surface of the charge exchange recombination spectroscopy diagnostics on ITER

  • A. P. Kuznetsov
  • O. I. Buzinskij
  • K. L. Gubsky
  • E. A. Nikitina
  • A. V. Savchenkov
  • B. A. Tarasov
  • S. N. Tugarinov
Interaction of Plasmas, Particle Beams, and Radiation with Matter

Abstract

A set of optical diagnostics is expected for measuring the plasma characteristics in ITER. Optical elements located inside discharge chambers are exposed to an intense radiation load, sputtering due to collisions with energetic atoms formed in the charge transfer processes, and contamination due to recondensation of materials sputtered from different parts of the construction of the chamber. Removing the films of the sputtered materials from the mirrors with the aid of pulsed laser radiation is an efficient cleaning method enabling recovery of the optical properties of the mirrors. In this work, we studied the efficiency of removal of metal oxide films by pulsed radiation of a fiber laser. Optimization of the laser cleaning conditions was carried out on samples representing metal substrates polished with optical quality with deposition of films on them imitating the chemical composition and conditions expected in ITER. It is shown that, by a proper selection of modes of radiation exposure to the surface with a deposited film, it is feasible to restore the original high reflection characteristics of optical elements.

Keywords

optical diagnostics for ITER the first mirror laser cleaning of metal mirror surface 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    S. N. Tugarinov, I. L. Beigman, L. A. Vainstein, et al., Plasma Phys. 30, 147 (2004).Google Scholar
  2. 2.
    F. B. Rosmej, R. Stamm, and V. S. Lisitsa, Europhys. Lett. 73, 342 (2006).CrossRefADSGoogle Scholar
  3. 3.
    E. E. Mukhin, S. Yu. Tolstyakov, M. M. Kochergin, et al., Vopr. At. Nauki Tekh., Ser. Termoyad. Sintez, No. 2, 59 (2010).[in Russian].Google Scholar
  4. 4.
    I. V. Moskalenko, Doctoral (Phys. Math.) Dissertation (2004) [in Russian].Google Scholar
  5. 5.
    F. W. Perkins, D. E. Post, N. A. Uckan, et al., Nucl. Fusion 39, 2080 (1999).CrossRefGoogle Scholar
  6. 6.
    K. Yu. Vukolov, M. I. Guseva, S. A. Evstigneev, et al., Plasma Devices Operat. 12, 193 (2004).CrossRefGoogle Scholar
  7. 7.
    M. Lipa, B. Schunke, K. Vukolov, et al., Fusion Eng. Des. A 81, 221 (2006).CrossRefGoogle Scholar
  8. 8.
    D. Rudakov, J. H. Yu, J. A. Boedo, E. M. Hollmann, et al., Rev. Sci. Instrum. 79, 10F303 (2008).CrossRefGoogle Scholar
  9. 9.
    D. Ivanova, M. Rubel, A. Widdowson, et al., Phys. Scr. 159, 014011 (2014).CrossRefGoogle Scholar
  10. 10.
    Y. Rong, C. Junling, C. Longwei, D. Rui, and Z. Dahuan, Plasma Sci. Technol. 16, 1158 (2014).CrossRefGoogle Scholar
  11. 11.
    L. Moser, R. Steiner, F. Leipold, R. Reichle, L. Marot, and E. Meyer, J. Nucl. Mater. 463, 940 (2015).CrossRefADSGoogle Scholar
  12. 12.
    C. H. Skinner, C. A. Gentile, and R. Doerner, Fusion Sci. Technol. 64, 1 (2013).Google Scholar
  13. 13.
    M. Wisse, L. Marot, and B. Eren, Fusion Eng. Des. 88, 388 (2013).CrossRefGoogle Scholar
  14. 14.
    M. Wisse, L. Marot, A. Widdowson, and M. Rubel, Fusion Eng. Des. 89, 122 (2014).CrossRefGoogle Scholar
  15. 15.
    W. M. Steen and J. Mazumder, Laser Material Processing (Springer, London, 2010).CrossRefGoogle Scholar
  16. 16.
    V. P. Veiko, E. A. Shakhno, V. N. Smirnov, A. M. Miaskovski, and S. S. Borovskih, Laser Part. Beams 24, 203 (2006).CrossRefADSGoogle Scholar
  17. 17.
    L. B. Begrambekov, A. A. Gordeev, and Ya. A. Sadovskii, J. Surf. Invest.: X-ray, Synchrotron Neutron Tech. 2, 419 (2008).CrossRefGoogle Scholar
  18. 18.
    A. P. Kuznetsov, A. S. Alexandrova, O. I. Buzhinskij, K. L. Gubskiy, T. V. Kazieva, A. V. Savchenkov, and S. N. Tugarinov, Vopr. At. Nauki Tekh., Ser. Termoyad. Sintez 37 (4), 49 (2014).[in Russian].Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  • A. P. Kuznetsov
    • 1
  • O. I. Buzinskij
    • 2
  • K. L. Gubsky
    • 1
  • E. A. Nikitina
    • 1
  • A. V. Savchenkov
    • 1
  • B. A. Tarasov
    • 1
  • S. N. Tugarinov
    • 2
  1. 1.National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)MoscowRussia
  2. 2.State Research Center Troitsk Institute for Innovation and Fusion Research (TRINITI)Troitsk, Moscow oblastRussia

Personalised recommendations