Investigations of VH-mode in DIII-D and JET

C. M. Greenfield; B. Balet; K. H. Burrell; M. S. Chu; J. G. Cordey; J. C. Deboo; N. Deliyanakis; E. J. Doyle; R. J. Groebner; G. L. Jackson; S. Konoshima; D. P. O'Brien; L. Porte; C. L. Rettig; T. H. Osborne; H. St John; A. C.C. Sips; G. M. Staebler; E. J. Strait; P. M. Stubberfield; T. S. Taylor; S. J. Thompson; K. Thomsen; A. D. Turnbull

doi:10.1088/0741-3335/35/SB/022

Investigations of VH-mode in DIII-D and JET

C. M. Greenfield, B. Balet, K. H. Burrell, M. S. Chu, J. G. Cordey, J. C. Deboo, N. Deliyanakis, E. J. Doyle, R. J. Groebner, G. L. Jackson, S. Konoshima, D. P. O'Brien, L. Porte, C. L. Rettig, T. H. Osborne, H. St John, A. C.C. Sips, G. M. Staebler, E. J. Strait, P. M. StubberfieldT. S. Taylor, S. J. Thompson, K. Thomsen, A. D. Turnbull

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Abstract

The VH-mode regime of high confinement has been observed in both DIII-D and JET. VH-mode is characterized by thermal confinement twice that seen in H-mode, with the edge transport barrier penetrating deeper into the plasma. Two mechanisms have been identified as important in achieving this high level of confinement. Expansion of the E*B velocity shear turbulence suppression zone is important in allowing reductions in local transport, while access to the second ballooning stability regime in the edge allows avoidance or elimination of ELMs which impede the confinement improvement. The high performance phase of these discharges is usually terminated by an MHD event which removes energy from a large portion of the plasma cross-section, and is followed by an H-mode phase.

Original language	English
Article number	022
Pages (from-to)	B263-B276
Journal	Plasma Physics and Controlled Fusion
Volume	35
Issue number	SB
DOIs	https://doi.org/10.1088/0741-3335/35/SB/022
State	Published - 1993
Externally published	Yes

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Greenfield, C. M., Balet, B., Burrell, K. H., Chu, M. S., Cordey, J. G., Deboo, J. C., Deliyanakis, N., Doyle, E. J., Groebner, R. J., Jackson, G. L., Konoshima, S., O'Brien, D. P., Porte, L., Rettig, C. L., Osborne, T. H., St John, H., Sips, A. C. C., Staebler, G. M., Strait, E. J., ... Turnbull, A. D. (1993). Investigations of VH-mode in DIII-D and JET. Plasma Physics and Controlled Fusion, 35(SB), B263-B276. Article 022. https://doi.org/10.1088/0741-3335/35/SB/022

@article{b76538a09904466991811caba6d7b97f,

title = "Investigations of VH-mode in DIII-D and JET",

abstract = "The VH-mode regime of high confinement has been observed in both DIII-D and JET. VH-mode is characterized by thermal confinement twice that seen in H-mode, with the edge transport barrier penetrating deeper into the plasma. Two mechanisms have been identified as important in achieving this high level of confinement. Expansion of the E*B velocity shear turbulence suppression zone is important in allowing reductions in local transport, while access to the second ballooning stability regime in the edge allows avoidance or elimination of ELMs which impede the confinement improvement. The high performance phase of these discharges is usually terminated by an MHD event which removes energy from a large portion of the plasma cross-section, and is followed by an H-mode phase.",

author = "Greenfield, {C. M.} and B. Balet and Burrell, {K. H.} and Chu, {M. S.} and Cordey, {J. G.} and Deboo, {J. C.} and N. Deliyanakis and Doyle, {E. J.} and Groebner, {R. J.} and Jackson, {G. L.} and S. Konoshima and O'Brien, {D. P.} and L. Porte and Rettig, {C. L.} and Osborne, {T. H.} and {St John}, H. and Sips, {A. C.C.} and Staebler, {G. M.} and Strait, {E. J.} and Stubberfield, {P. M.} and Taylor, {T. S.} and Thompson, {S. J.} and K. Thomsen and Turnbull, {A. D.}",

year = "1993",

doi = "10.1088/0741-3335/35/SB/022",

language = "English",

volume = "35",

pages = "B263--B276",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

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}

Greenfield, CM, Balet, B, Burrell, KH, Chu, MS, Cordey, JG, Deboo, JC, Deliyanakis, N, Doyle, EJ, Groebner, RJ, Jackson, GL, Konoshima, S, O'Brien, DP, Porte, L, Rettig, CL, Osborne, TH, St John, H, Sips, ACC, Staebler, GM, Strait, EJ, Stubberfield, PM, Taylor, TS, Thompson, SJ, Thomsen, K & Turnbull, AD 1993, 'Investigations of VH-mode in DIII-D and JET', Plasma Physics and Controlled Fusion, vol. 35, no. SB, 022, pp. B263-B276. https://doi.org/10.1088/0741-3335/35/SB/022

TY - JOUR

T1 - Investigations of VH-mode in DIII-D and JET

AU - Greenfield, C. M.

AU - Balet, B.

AU - Burrell, K. H.

AU - Chu, M. S.

AU - Cordey, J. G.

AU - Deboo, J. C.

AU - Deliyanakis, N.

AU - Doyle, E. J.

AU - Groebner, R. J.

AU - Jackson, G. L.

AU - Konoshima, S.

AU - O'Brien, D. P.

AU - Porte, L.

AU - Rettig, C. L.

AU - Osborne, T. H.

AU - St John, H.

AU - Sips, A. C.C.

AU - Staebler, G. M.

AU - Strait, E. J.

AU - Stubberfield, P. M.

AU - Taylor, T. S.

AU - Thompson, S. J.

AU - Thomsen, K.

AU - Turnbull, A. D.

PY - 1993

Y1 - 1993

N2 - The VH-mode regime of high confinement has been observed in both DIII-D and JET. VH-mode is characterized by thermal confinement twice that seen in H-mode, with the edge transport barrier penetrating deeper into the plasma. Two mechanisms have been identified as important in achieving this high level of confinement. Expansion of the E*B velocity shear turbulence suppression zone is important in allowing reductions in local transport, while access to the second ballooning stability regime in the edge allows avoidance or elimination of ELMs which impede the confinement improvement. The high performance phase of these discharges is usually terminated by an MHD event which removes energy from a large portion of the plasma cross-section, and is followed by an H-mode phase.

AB - The VH-mode regime of high confinement has been observed in both DIII-D and JET. VH-mode is characterized by thermal confinement twice that seen in H-mode, with the edge transport barrier penetrating deeper into the plasma. Two mechanisms have been identified as important in achieving this high level of confinement. Expansion of the E*B velocity shear turbulence suppression zone is important in allowing reductions in local transport, while access to the second ballooning stability regime in the edge allows avoidance or elimination of ELMs which impede the confinement improvement. The high performance phase of these discharges is usually terminated by an MHD event which removes energy from a large portion of the plasma cross-section, and is followed by an H-mode phase.

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U2 - 10.1088/0741-3335/35/SB/022

DO - 10.1088/0741-3335/35/SB/022

M3 - Article

AN - SCOPUS:0001255849

SN - 0741-3335

VL - 35

SP - B263-B276

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - SB

M1 - 022

ER -

Investigations of VH-mode in DIII-D and JET

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