Plasma and Fusion Research

Volume 14, 2402003 (2019)

Regular Articles

A Full Wave Simulation on the Density Dependence of a Slow Wave Excitation in the GAMMA 10/PDX Central Cell with TASK/WF3D
Ryuya IKEZOE, Yushi KUBOTA1), Makoto ICHIMURA1), Mafumi HIRATA1), Shuhei SUMIDA1), Seowon JANG1), Koki IZUMI1), Atsuto TANAKA1), Ryo SEKINE1), Hiroki KAYANO1), Yoriko SHIMA1), Junko KOHAGURA1), Masayuki YOSHIKAWA1), Mizuki SAKAMOTO1), Yousuke NAKASHIMA1) and Atsushi FUKUYAMA2)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
Department of Nuclear Engineering, Kyoto University, Kyoto 615-8540, Japan
(Received 30 September 2018 / Accepted 15 November 2018 / Published 24 January 2019)


Beach heating using a slow Alfvén wave in ion cyclotron range of frequencies would be the first candidate for ion heating in a DEMO-relevant divertor testing linear plasma device if it is applicable to a high-density regime. To clarify its availability, the density dependence of a slow wave excitation is investigated using a full wave simulation with TASK/WF3D code in the GAMMA 10/PDX central cell configuration, where there is an extensive track record of a beach heating. A shielding effect is successfully demonstrated and well understood under a three-dimensional configuration in the limit of cold plasma approximation. As the density increases, excitable left-handed electric field, which contributes to ion cyclotron heating, degrades more and more from a core region, and resultantly the ion absorption region goes outwards with reducing its power. For core densities above 1020 m−3, the wave field exists only at a very edge, and ion heating becomes negligible unless the wave frequency is much increased with a correspondent magnetic field enhancement.


slow wave, wave excitation, shielding effect, full wave calculation, mirror plasma

DOI: 10.1585/pfr.14.2402003


  • [1] Ch. Linsmeier et al., Nucl. Fusion 57, 092007 (2017).
  • [2] Y. Ueda et al., Nucl. Fusion 57, 092006 (2017).
  • [3] Ch. Linsmeier et al., Nucl. Fusion 57, 092012 (2017).
  • [4] N. Ohno, Plasma Phys. Control. Fusion 59, 034007 (2017).
  • [5] M. Ichimura et al., Nucl. Fusion 28, 799 (1988).
  • [6] M. Ichimura et al., Plasma Phys. Reports 28, 727 (2002).
  • [7] J. Rapp et al., Nucl. Fusion 57, 116001 (2017).
  • [8] C.J. Beers et al., Phys. Plasmas 25, 013526 (2018).
  • [9] R. Ikezoe et al., Fusion Sci. Technol. 68, 63 (2015).
  • [10] S. Sumida et al., Fusion Sci. Technol. 68, 136 (2015).
  • [11] R. Ikezoe et al., Rev. Sci. Instrum. 88, 033504 (2017).
  • [12] R. Ikezoe et al., JINST 12, C12017 (2017).
  • [13] A. Fukuyama et al., Proc. 20th Int. Conf. Fusion Energy, Vilamoura, Portugal, November 1-6, 2004, TH/P2-3 (2004).
  • [14] Y. Yamaguchi et al., Plasma Phys. Control. Fusion 48, 1155 (2006).
  • [15] T. Yokoyama et al., Fusion Sci. Technol. 68, 185 (2015).