Recent VH-mode results on DIII-D

T. H. Osborne; K. H. Burrell; T. N. Carlstrom; M. S. Chu; J. C. Deboo; E. J. Doyle; J. R. Ferron; P. Gohil; C. M. Greenfield; R. J. Groebner; A. W. Hyatt; G. L. Jackson; Y. B. Kim; S. Konoshima; T. K. Kurki-Suonio; R. J. La Haye; E. A. Lazarus; L. L. Lao; S. I. Lippmann; T. W. Petrie; C. L. Rettig; R. D. Stambaugh; G. M. Staebler; H. St John; E. J. Strait; T. S. Taylor; S. J. Thompson; A. D. Turnbull; D. Wroblewski

doi:10.1088/0741-3335/36/7A/034

Recent VH-mode results on DIII-D

T. H. Osborne, K. H. Burrell, T. N. Carlstrom, M. S. Chu, J. C. Deboo, E. J. Doyle, J. R. Ferron, P. Gohil, C. M. Greenfield, R. J. Groebner, A. W. Hyatt, G. L. Jackson, Y. B. Kim, S. Konoshima, T. K. Kurki-Suonio, R. J. La Haye, E. A. Lazarus, L. L. Lao, S. I. Lippmann, T. W. PetrieC. L. Rettig, R. D. Stambaugh, G. M. Staebler, H. St John, E. J. Strait, T. S. Taylor, S. J. Thompson, A. D. Turnbull, D. Wroblewski

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Abstract

A regime of improved H-mode energy confinement, VH-mode, is obtained in the DIII-D tokamak with adequate vessel conditioning. The improved confinement in VH-mode is consistent with the extension of the region of high E*B velocity shear turbulence suppression zone further in from the plasma boundary. The energy confinement enhancement in VH-mode can be limited by ELMs, localized momentum transfer events, or operation at high heating power or low q. Energy confinement enhancement improves with increasing triangularity of the plasma cross section and is independent of elongation. The termination of VH-mode is associated with an edge localized kink mode which is destabilized by both the large edge pressure gradient and edge current density.

Original language	English
Article number	034
Pages (from-to)	A237-A242
Journal	Plasma Physics and Controlled Fusion
Volume	36
Issue number	7 A
DOIs	https://doi.org/10.1088/0741-3335/36/7A/034
State	Published - 1994
Externally published	Yes

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Osborne, T. H., Burrell, K. H., Carlstrom, T. N., Chu, M. S., Deboo, J. C., Doyle, E. J., Ferron, J. R., Gohil, P., Greenfield, C. M., Groebner, R. J., Hyatt, A. W., Jackson, G. L., Kim, Y. B., Konoshima, S., Kurki-Suonio, T. K., La Haye, R. J., Lazarus, E. A., Lao, L. L., Lippmann, S. I., ... Wroblewski, D. (1994). Recent VH-mode results on DIII-D. Plasma Physics and Controlled Fusion, 36(7 A), A237-A242. Article 034. https://doi.org/10.1088/0741-3335/36/7A/034

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title = "Recent VH-mode results on DIII-D",

abstract = "A regime of improved H-mode energy confinement, VH-mode, is obtained in the DIII-D tokamak with adequate vessel conditioning. The improved confinement in VH-mode is consistent with the extension of the region of high E*B velocity shear turbulence suppression zone further in from the plasma boundary. The energy confinement enhancement in VH-mode can be limited by ELMs, localized momentum transfer events, or operation at high heating power or low q. Energy confinement enhancement improves with increasing triangularity of the plasma cross section and is independent of elongation. The termination of VH-mode is associated with an edge localized kink mode which is destabilized by both the large edge pressure gradient and edge current density.",

author = "Osborne, {T. H.} and Burrell, {K. H.} and Carlstrom, {T. N.} and Chu, {M. S.} and Deboo, {J. C.} and Doyle, {E. J.} and Ferron, {J. R.} and P. Gohil and Greenfield, {C. M.} and Groebner, {R. J.} and Hyatt, {A. W.} and Jackson, {G. L.} and Kim, {Y. B.} and S. Konoshima and Kurki-Suonio, {T. K.} and {La Haye}, {R. J.} and Lazarus, {E. A.} and Lao, {L. L.} and Lippmann, {S. I.} and Petrie, {T. W.} and Rettig, {C. L.} and Stambaugh, {R. D.} and Staebler, {G. M.} and John, {H. St} and Strait, {E. J.} and Taylor, {T. S.} and Thompson, {S. J.} and Turnbull, {A. D.} and D. Wroblewski",

year = "1994",

doi = "10.1088/0741-3335/36/7A/034",

language = "English",

volume = "36",

pages = "A237--A242",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

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Osborne, TH, Burrell, KH, Carlstrom, TN, Chu, MS, Deboo, JC, Doyle, EJ, Ferron, JR, Gohil, P, Greenfield, CM, Groebner, RJ, Hyatt, AW, Jackson, GL, Kim, YB, Konoshima, S, Kurki-Suonio, TK, La Haye, RJ, Lazarus, EA, Lao, LL, Lippmann, SI, Petrie, TW, Rettig, CL, Stambaugh, RD, Staebler, GM, John, HS, Strait, EJ, Taylor, TS, Thompson, SJ, Turnbull, AD & Wroblewski, D 1994, 'Recent VH-mode results on DIII-D', Plasma Physics and Controlled Fusion, vol. 36, no. 7 A, 034, pp. A237-A242. https://doi.org/10.1088/0741-3335/36/7A/034

TY - JOUR

T1 - Recent VH-mode results on DIII-D

AU - Osborne, T. H.

AU - Burrell, K. H.

AU - Carlstrom, T. N.

AU - Chu, M. S.

AU - Deboo, J. C.

AU - Doyle, E. J.

AU - Ferron, J. R.

AU - Gohil, P.

AU - Greenfield, C. M.

AU - Groebner, R. J.

AU - Hyatt, A. W.

AU - Jackson, G. L.

AU - Kim, Y. B.

AU - Konoshima, S.

AU - Kurki-Suonio, T. K.

AU - La Haye, R. J.

AU - Lazarus, E. A.

AU - Lao, L. L.

AU - Lippmann, S. I.

AU - Petrie, T. W.

AU - Rettig, C. L.

AU - Stambaugh, R. D.

AU - Staebler, G. M.

AU - John, H. St

AU - Strait, E. J.

AU - Taylor, T. S.

AU - Thompson, S. J.

AU - Turnbull, A. D.

AU - Wroblewski, D.

PY - 1994

Y1 - 1994

N2 - A regime of improved H-mode energy confinement, VH-mode, is obtained in the DIII-D tokamak with adequate vessel conditioning. The improved confinement in VH-mode is consistent with the extension of the region of high E*B velocity shear turbulence suppression zone further in from the plasma boundary. The energy confinement enhancement in VH-mode can be limited by ELMs, localized momentum transfer events, or operation at high heating power or low q. Energy confinement enhancement improves with increasing triangularity of the plasma cross section and is independent of elongation. The termination of VH-mode is associated with an edge localized kink mode which is destabilized by both the large edge pressure gradient and edge current density.

AB - A regime of improved H-mode energy confinement, VH-mode, is obtained in the DIII-D tokamak with adequate vessel conditioning. The improved confinement in VH-mode is consistent with the extension of the region of high E*B velocity shear turbulence suppression zone further in from the plasma boundary. The energy confinement enhancement in VH-mode can be limited by ELMs, localized momentum transfer events, or operation at high heating power or low q. Energy confinement enhancement improves with increasing triangularity of the plasma cross section and is independent of elongation. The termination of VH-mode is associated with an edge localized kink mode which is destabilized by both the large edge pressure gradient and edge current density.

UR - http://www.scopus.com/inward/record.url?scp=0028467402&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/36/7A/034

DO - 10.1088/0741-3335/36/7A/034

M3 - Article

AN - SCOPUS:0028467402

SN - 0741-3335

VL - 36

SP - A237-A242

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 7 A

M1 - 034

ER -

Recent VH-mode results on DIII-D

Abstract

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