Plasma and Fusion Research

Volume 18, 2402042 (2023)

Regular Articles

ICRF Plasma Production with Hydrogen Minority Heating in Uragan-2M and Large Helical Device

Yurii V. KOVTUN¹⁾, Vladimir E. MOISEENKO^1,2,3), Shuji KAMIO⁴⁾, Hiroshi KASAHARA⁵⁾, Tetsuo SEKI⁵⁾, Kenji SAITO⁵⁾, Ryosuke SEKI⁵⁾, Alexei V. LOZIN¹⁾, Rostislav O. PAVLICHENKO¹⁾, Anatolii N. SHAPOVAL¹⁾, Igor E. GARKUSHA^1,2), Arturo ALONSO⁶⁾, Andreas DINKLAGE⁷⁾, Dirk HARTMANN⁷⁾, Yevgen O. KAZAKOV⁸⁾, Heinrich LAQUA⁷⁾, Josef ONGENA⁸⁾, Torsten STANGE⁷⁾ and Tom WAUTERS⁹⁾

1): Institute of Plasma Physics of the NSC KIPT, Kharkiv, Ukraine
2): V.N. Karazin Kharkiv National University, Kharkiv, Ukraine
3): Ångström Laboratory, Uppsala University, Uppsala, Sweden
4): University of California Irvine, Irvine, CA, United States of America
5): National Institute for Fusion Science, Toki, Japan
6): Laboratorio Nacional de Fusion, CIEMAT, Madrid, Spain
7): Max-Planck-Institut für Plasmaphysik, Greifswald, Germany
8): Laboratory for Plasma Physics, ERM/KMS, Brussels, Belgium
9): ITER Organization, St. Paul-lez-Durance, France

(Received 7 January 2023 / Accepted 11 April 2023 / Published 22 June 2023)

Abstract

This report compares results ion-cyclotron range of frequencies (ICRF) plasma production at hydrogen minority regime in Uragan-2M (U-2M) and Large Helical Device (LHD). The condition of the presence of the fundamental harmonic ion cyclotron resonance zone for the hydrogen inside the plasma column should be fulfilled for this method. The scenario is successful at both machines and weakly sensitive to the variation of the hydrogen concentration in the H₂+He gas mixture. It should be noted that at LHD the start up is slower than at U-2M. The comparison of plasma production in ICRF with hydrogen minority at U-2M and LHD indicate that this scenario can be scaled to larger stellarator devices. The experiments made are the base for the proposal for usage this scenario for plasma production in ICRF at Wendelstein 7-X at magnetic field reduced to 1.7 T.

Keywords

plasma production, ion cyclotron heating, stellarator, Uragan-2M, Large Helical Device, RF power

DOI: 10.1585/pfr.18.2402042

Full Text

PDF format (1.7Mbytes) PDF Download

References

[1] F. Warmer et al., Plasma Phys. Control. Fusion 58, 074006 (2016).
[2] V. Erckmann et al., Fusion Sci. Technol. 52, 291 (2007).
[3] M. Endler et al., Fusion Eng. Des. 167, 112381 (2021).
[4] J. Ongena et al., Phys. Plasmas 21, 061514 (2014).
[5] D.A. Castaño Bardawil et al., Fusion Eng. Des. 166, 112205 (2021).
[6] A. Lazerson et al., Nucl. Fusion 61 096008 (2021).
[7] N.B. Marushchenko et al., EPJ Web Conf. 203, 01006 (2019).
[8] V.E. Moiseenko et al., J. Plasma Phys. 86, 905860517 (2020).
[9] V.E. Moiseenko et al., J. Fusion Energy 41, 15 (2022).
[10] Yu.V. Kovtun et al., Plasma Fusion Res. 17, 2402034 (2022).
[11] Yu.V. Kovtun et al., 32nd Symposium on Fusion Technology, 18-23 September 2022, Dubrovnik, Croatia, P-2.322.
[12] S. Kamio et al., Nucl. Fusion 61, 114004 (2021).
[13] V. Bykov et al., Fusion Technol. 17, 140 (1990).
[14] O.S. Pavlichenko, Plasma Phys. Control. Fusion 35, B223 (1993).
[15] V.E. Moiseenko et al., Nucl. Fusion 51, 083036 (2011).
[16] V.E. Moiseenko et al., Probl. At. Sci. Technol. Ser.: Plasma Phys. 1, 263 (2019).
[17] A.V. Lozin et al., Probl. At. Sci. Technol. Ser.: Plasma Phys. 6, 10 (2020).
[18] A. Iiyoshi et al., Nucl. Fusion 39, 1245 (1999).
[19] M. Osakabe et al., Fusion Sci. Technol. 72, 199 (2017).
[20] S. Kamio et al., Nucl. Fusion 62, 016004 (2022).
[21] T. Mutoh et al., Fusion Sci. Technol. 58, 504 (2010).
[22] H. Kasahara et al., 38th EPS Conf. Plasma Physics 27 June - 1 July 2011, Strasbourg, France.
[23] K. Saito et al., Fusion Eng. Des. 96-97, 583 (2015).
[24] A.V. Lozin et al., Probl. At. Sci. Technol. Ser.: Plasma Electronics and New Methods of Acceleration 4, 195 (2021).
[25] H.G. Esser et al., J. Nucl. Mater. 241, 861 (1997).
[26] R. Brakel et al., J. Nucl. Mater. 290, 1160 (2001).
[27] A. Lyssoivan et al., J. Nucl. Mater. 337-339, 456 (2005).
[28] A. Lyssoivan et al., J. Nucl. Mater. 363-365, 1358 (2007).
[29] M.K. Paul et al., AIP Conf. Proc. 1187, 177 (2009).
[30] A. Lyssoivan et al., J. Nucl. Mater. 390-391, 907 (2009).
[31] A. Lyssoivan et al., Plasma Phys. Control. Fusion 54, 074014 (2012).