ELM-free stationary H-mode plasmas in the ASDEX upgrade tokamak

W. Suttrop; M. Maraschek; G. D. Conway; H. U. Fahrbach; G. Haas; L. D. Horton; T. Kurki-Suonio; C. J. Lasnier; A. W. Leonard; C. F. Maggi; H. Meister; A. Mück; R. Neu; I. Nunes; Th Pütterich; M. Reich; A. C.C. Sips

doi:10.1088/0741-3335/45/8/302

ELM-free stationary H-mode plasmas in the ASDEX upgrade tokamak

W. Suttrop, M. Maraschek, G. D. Conway, H. U. Fahrbach, G. Haas, L. D. Horton, T. Kurki-Suonio, C. J. Lasnier, A. W. Leonard, C. F. Maggi, H. Meister, A. Mück, R. Neu, I. Nunes, Th Pütterich, M. Reich, A. C.C. Sips

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Abstract

ELM-free H-mode plasmas with stationary plasma density and radiation level are obtained in the ASDEX Upgrade tokamak with large clearance between the last closed flux surface and the wall, and neutral beam injection in a toroidal direction opposite to that of the plasma current. This behaviour is accompanied by a characteristic narrow-band magnetohydrodynamic (MHD) oscillation with clear harmonics up to n = 11 visible. This mode is localized in the plasma edge region. Conditions and properties of the stationary ELM-free phases and the edge MHD oscillation closely resemble that of the 'quiescent H-mode' and the 'edge harmonic oscillation' found in the DIII-D tokamak (Burrell K H et al 2002 Plasma Phys. Control. Fusion 44 A253). In addition, high-frequency MHD oscillations are found with an amplitude correlated with fluctuations of the divertor D_α intensity, suggesting a possible relevance of these modes for particle transport.

Original language	English
Pages (from-to)	1399-1416
Number of pages	18
Journal	Plasma Physics and Controlled Fusion
Volume	45
Issue number	8
DOIs	https://doi.org/10.1088/0741-3335/45/8/302
State	Published - Aug 2003
Externally published	Yes

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Suttrop, W., Maraschek, M., Conway, G. D., Fahrbach, H. U., Haas, G., Horton, L. D., Kurki-Suonio, T., Lasnier, C. J., Leonard, A. W., Maggi, C. F., Meister, H., Mück, A., Neu, R., Nunes, I., Pütterich, T., Reich, M., & Sips, A. C. C. (2003). ELM-free stationary H-mode plasmas in the ASDEX upgrade tokamak. Plasma Physics and Controlled Fusion, 45(8), 1399-1416. https://doi.org/10.1088/0741-3335/45/8/302

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title = "ELM-free stationary H-mode plasmas in the ASDEX upgrade tokamak",

abstract = "ELM-free H-mode plasmas with stationary plasma density and radiation level are obtained in the ASDEX Upgrade tokamak with large clearance between the last closed flux surface and the wall, and neutral beam injection in a toroidal direction opposite to that of the plasma current. This behaviour is accompanied by a characteristic narrow-band magnetohydrodynamic (MHD) oscillation with clear harmonics up to n = 11 visible. This mode is localized in the plasma edge region. Conditions and properties of the stationary ELM-free phases and the edge MHD oscillation closely resemble that of the 'quiescent H-mode' and the 'edge harmonic oscillation' found in the DIII-D tokamak (Burrell K H et al 2002 Plasma Phys. Control. Fusion 44 A253). In addition, high-frequency MHD oscillations are found with an amplitude correlated with fluctuations of the divertor Dα intensity, suggesting a possible relevance of these modes for particle transport.",

author = "W. Suttrop and M. Maraschek and Conway, {G. D.} and Fahrbach, {H. U.} and G. Haas and Horton, {L. D.} and T. Kurki-Suonio and Lasnier, {C. J.} and Leonard, {A. W.} and Maggi, {C. F.} and H. Meister and A. M{\"u}ck and R. Neu and I. Nunes and Th P{\"u}tterich and M. Reich and Sips, {A. C.C.}",

year = "2003",

month = aug,

doi = "10.1088/0741-3335/45/8/302",

language = "English",

volume = "45",

pages = "1399--1416",

journal = "Plasma Physics and Controlled Fusion",

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publisher = "IOP Publishing Ltd.",

number = "8",

}

Suttrop, W, Maraschek, M, Conway, GD, Fahrbach, HU, Haas, G, Horton, LD, Kurki-Suonio, T, Lasnier, CJ, Leonard, AW, Maggi, CF, Meister, H, Mück, A, Neu, R, Nunes, I, Pütterich, T, Reich, M & Sips, ACC 2003, 'ELM-free stationary H-mode plasmas in the ASDEX upgrade tokamak', Plasma Physics and Controlled Fusion, vol. 45, no. 8, pp. 1399-1416. https://doi.org/10.1088/0741-3335/45/8/302

TY - JOUR

T1 - ELM-free stationary H-mode plasmas in the ASDEX upgrade tokamak

AU - Suttrop, W.

AU - Maraschek, M.

AU - Conway, G. D.

AU - Fahrbach, H. U.

AU - Haas, G.

AU - Horton, L. D.

AU - Kurki-Suonio, T.

AU - Lasnier, C. J.

AU - Leonard, A. W.

AU - Maggi, C. F.

AU - Meister, H.

AU - Mück, A.

AU - Neu, R.

AU - Nunes, I.

AU - Pütterich, Th

AU - Reich, M.

AU - Sips, A. C.C.

PY - 2003/8

Y1 - 2003/8

N2 - ELM-free H-mode plasmas with stationary plasma density and radiation level are obtained in the ASDEX Upgrade tokamak with large clearance between the last closed flux surface and the wall, and neutral beam injection in a toroidal direction opposite to that of the plasma current. This behaviour is accompanied by a characteristic narrow-band magnetohydrodynamic (MHD) oscillation with clear harmonics up to n = 11 visible. This mode is localized in the plasma edge region. Conditions and properties of the stationary ELM-free phases and the edge MHD oscillation closely resemble that of the 'quiescent H-mode' and the 'edge harmonic oscillation' found in the DIII-D tokamak (Burrell K H et al 2002 Plasma Phys. Control. Fusion 44 A253). In addition, high-frequency MHD oscillations are found with an amplitude correlated with fluctuations of the divertor Dα intensity, suggesting a possible relevance of these modes for particle transport.

AB - ELM-free H-mode plasmas with stationary plasma density and radiation level are obtained in the ASDEX Upgrade tokamak with large clearance between the last closed flux surface and the wall, and neutral beam injection in a toroidal direction opposite to that of the plasma current. This behaviour is accompanied by a characteristic narrow-band magnetohydrodynamic (MHD) oscillation with clear harmonics up to n = 11 visible. This mode is localized in the plasma edge region. Conditions and properties of the stationary ELM-free phases and the edge MHD oscillation closely resemble that of the 'quiescent H-mode' and the 'edge harmonic oscillation' found in the DIII-D tokamak (Burrell K H et al 2002 Plasma Phys. Control. Fusion 44 A253). In addition, high-frequency MHD oscillations are found with an amplitude correlated with fluctuations of the divertor Dα intensity, suggesting a possible relevance of these modes for particle transport.

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JO - Plasma Physics and Controlled Fusion

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ER -

ELM-free stationary H-mode plasmas in the ASDEX upgrade tokamak

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