Regular Articles

Full Text / References

On the Source of Turbulence by Fuelling

Kimitaka ITOH^1,2,3) and Sanae-I. ITOH^3,4,5)

1)

Institute of Science and Technology Research, Chubu University, Kasugai, Aichi 487-8501, Japan

2)

National Institute for Fusion Science, Toki 509-5292, Japan

3)

Research Center for Plasma Turbulence, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

4)

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

5)

Graduate School of Engineering, Chubu University, Kasugai, Aichi 487-8501, Japan

(Received 4 December 2018 / Accepted 13 February 2019 / Published 10 April 2019)

Abstract

In order to understand observations that the wall conditioning, wall material and the way of fuelling of neutral particles influence the core confinement in magnetic confinement devices, possible roles of particle fuelling to enhance edge turbulence are discussed. Bootstrapping of edge turbulence by the coupling with the particle source and turbulence in SoL is shown to enhance of edge turbulence (i.e. fuelling fuels turbulence). Inference of this enhanced edge turbulence is discussed, including an additional role that makes the H-mode state more robust.

Copyright (c) 2019 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

effect of fueling on confinement, edge tubulence, SoL turbulence, neutral particle dynamics

DOI: 10.1585/pfr.14.3403058

Full Text

PDF format (112Kbytes)

References

• [1] J.D. Strachan et al., Phys. Rev. Lett. 58, 1004 (1987).
• [2] F.X. Soldner et al., Phys. Rev. Lett. 61, 1105 (1988).
• [3] M. Mori et al., Nucl. Fusion 28, 1892 (1988).
• [4] See a review, e.g., S.-I. Itoh, K. Itoh and A. Fukuyama, J. Nucl. Mater. 220-222, 117 (1995).
• [5] F. Wagner et al., Plasma Physics and Controlled Nuclear Fusion Research, Vol.1 (Vienna, IAEA, 1990) p.277.
• [6] M.N.A. Beurskens et al., Plasma Phys. Control. Fusion 55, 124043 (2013).
• [7] K. Itoh et al., Plasma Phys. Control. Fusion 37, 491 (1995).
• [8] K. Itoh et al., Nucl. Fusion 57, 056031 (2017).
• [9] S.I. Krasheninnikov, Phys. Lett. A 283, 368 (2001).
• [10] T.S. Hahm et al.: Plasma Phys. Control. Fusion 46, A323 (2004).
• [11] X. Garbet et al., Phys. Plasmas 14, 122305 (2007).
• [12] S. Sugita et al., Plasma Phys. Control. Fusion 54, 125001 (2012).
• [13] S.-I. Itoh et al., Phys. Rev. Lett. 60, 2276 (1988).
• [14] T. Kobayashi et al., Scientific Reports 7, 14971 (2017).