Rapid Communications

Full Text / References

Evidence for Global Edge-Core Interplay in Fusion Plasmas

Guilhem DIF-PRADALIER^1,2), Elisabetta CASCHERA¹⁾, Philippe GHENDRIH¹⁾, Yuuichi ASAHI¹⁾, Peter DONNEL¹⁾, Xavier GARBET¹⁾, Virginie GRANDGIRARD¹⁾, Guillaume LATU¹⁾, Claudia NORSCINI¹⁾ and Yanick SARAZIN¹⁾

1)

CEA, IRFM, F-13108 St. Paul-lez-Durance cedex, France

2)

Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8568, Japan

(Received 17 January 2017 / Accepted 14 February 2017 / Published 16 May 2017)

Abstract

Large-scale reactor-relevant fusion plasmas are likely to operate near marginal stability. In this regime, we show clear evidence of interplay between core and edge regions of the plasma. This result illustrates aspects of the controversial ‘shortfall problem’ in the far-core, near-edge so-called ‘No Man's Land’ region and a possible route to resolve this issue. More generally, it emphasises global-scale organisation of turbulence and relevance of edge dynamics to core confinement.

Copyright (c) 2017 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

plasma turbulence, self-organisation, gyrokinetics

DOI: 10.1585/pfr.12.1203012

Full Text

PDF format (278Kbytes)

References

• [1] P.H. Diamond et al., Phys. Plasmas 2, 3640 (1995).
• [2] P.A. Politzer, Phys. Rev. Lett. 84, 1192 (2000).
• [3] D.E. Newman et al., Phys. Plasmas 3, 1858 (1996).
• [4] X. Garbet et al., Phys. Plasmas 5, 2836 (1998).
• [5] G. Dif-Pradalier et al., Phys. Rev. E 82, 025401(R) (2010).
• [6] G. Dif-Pradalier et al., Phys. Rev. Lett. 114, 085004 (2015).
• [7] F. Rath et al., Phys. Plasmas 23, 052309 (2016).
• [8] G. Hornung et al., Nucl. Fusion 57, 014006 (2017).
• [9] C. Norscini et al., J. Phys.: Conf. Ser. 561, 012013 (2014).
• [10] V. Grandgirard et al., J. Comput. Phys. 217, 395 (2006).
• [11] V. Grandgirard et al., Comp. Phys. Comm. 207, 35 (2016).
• [12] G. Dif-Pradalier et al., Nucl. Fusion 57, 066026 (2017).
• [13] P.C. Liewer, Nucl. Fusion 25, 543 (1985).
• [14] B.D. Scott et al., Phys. Fluids B 3, 51 (1991).
• [15] C. Holland et al., Phys. Plasmas 18, 056113 (2011).
• [16] T. Görler et al., Phys. Plasmas 21, 122307 (2014).
• [17] T.S. Hahm et al., Plasma Phys. Control. Fusion 46, 323 (2004).
• [18] N. Mattor et al., Phys. Rev. Lett. 72, 486 (1994).
• [19] B.B. Kadomtsev, Plasma Phys. Control. Fusion 34, 1931 (1992).
• [20] X. Garbet et al., Nucl. Fusion 34, 963 (1994).
• [21] A.M. Dimits et al., Phys. Plasmas 7, 969 (2000).
• [22] P.H. Diamond et al., Phys. Rev. Lett. 78, 1472 (1997).
• [23] Y. Kosuga et al., Phys. Plasmas 21, 055701 (2014).