Improved confinement in high li lower hybrid driven steady state plasmas in TORE SUPRA

G. T. Hoang; C. Gil; E. Joffrin; D. Moreau; A. Becoulet; P. Bibet; J. P. Bizarro; R. V. Budny; J. Carrasco; J. P. Coulon; C. De Michelis; T. Dudok De Wit; P. Monier-Garbet; M. Goniche; R. Guirlet; T. Hutter; S. M. Kaye; J. Lasalle; L. Laurent; P. Lecoustey; X. Litaudon; M. Mattioli; Y. Peysson; A. L. Pecquet; G. Rey; S. A. Sabbagh; B. Saoutic; G. Tonon; J. C. Vallet

doi:10.1088/0029-5515/34/1/I05

Improved confinement in high l_i lower hybrid driven steady state plasmas in TORE SUPRA

G. T. Hoang
, C. Gil
, E. Joffrin
, D. Moreau
, A. Becoulet
, P. Bibet
, J. P. Bizarro
, R. V. Budny
, J. Carrasco
, J. P. Coulon
, C. De Michelis
, T. Dudok De Wit
, P. Monier-Garbet
, M. Goniche
, R. Guirlet
, T. Hutter
, S. M. Kaye
, J. Lasalle
, L. Laurent
, P. Lecoustey

X. Litaudon, M. Mattioli, Y. Peysson, A. L. Pecquet, G. Rey, S. A. Sabbagh, B. Saoutic, G. Tonon, J. C. Vallet

Research output: Contribution to journal › Article › peer-review

109 Scopus citations

Abstract

The global energy confinement of combined ohmic and lower hybrid driven TORE SUPRA plasmas has been analysed at various densities. In contradiction to the L mode ITER scaling law, this analysis indicates that the global energy confinement time depends strongly on the plasma density. Furthermore, the thermal electron energy content of steady state discharges is found to be in good agreement with the global Rebut-Lallia-Watkins (RLW) scaling law. Current ramp experiments show an enhancement of the global energy confinement with the internal inductance, l_i. These results have been extended to steady state regimes with lower hybrid current drive. Improved confinement has been obtained in a high l_i steady state plasma (l_i=1.7), where the modification of the current profile by lower hybrid waves leads to an increase in the central value of the safety factor (qψ(0) ≈ 2). In this case, the global confinement time is shown to exceed the value predicted by the RLW scaling law by 40%.

Original language	English (US)
Article number	I05
Pages (from-to)	75-85
Number of pages	11
Journal	Nuclear Fusion
Volume	34
Issue number	1
DOIs	https://doi.org/10.1088/0029-5515/34/1/I05
State	Published - 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/0029-5515/34/1/I05

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Hoang, G. T., Gil, C., Joffrin, E., Moreau, D., Becoulet, A., Bibet, P., Bizarro, J. P., Budny, R. V., Carrasco, J., Coulon, J. P., De Michelis, C., De Wit, T. D., Monier-Garbet, P., Goniche, M., Guirlet, R., Hutter, T., Kaye, S. M., Lasalle, J., Laurent, L., ... Vallet, J. C. (1994). Improved confinement in high l_i lower hybrid driven steady state plasmas in TORE SUPRA. Nuclear Fusion, 34(1), 75-85. Article I05. https://doi.org/10.1088/0029-5515/34/1/I05

@article{81197e63b89b4e25a7b7b4fd96eac472,

title = "Improved confinement in high li lower hybrid driven steady state plasmas in TORE SUPRA",

abstract = "The global energy confinement of combined ohmic and lower hybrid driven TORE SUPRA plasmas has been analysed at various densities. In contradiction to the L mode ITER scaling law, this analysis indicates that the global energy confinement time depends strongly on the plasma density. Furthermore, the thermal electron energy content of steady state discharges is found to be in good agreement with the global Rebut-Lallia-Watkins (RLW) scaling law. Current ramp experiments show an enhancement of the global energy confinement with the internal inductance, li. These results have been extended to steady state regimes with lower hybrid current drive. Improved confinement has been obtained in a high li steady state plasma (li=1.7), where the modification of the current profile by lower hybrid waves leads to an increase in the central value of the safety factor (qψ(0) ≈ 2). In this case, the global confinement time is shown to exceed the value predicted by the RLW scaling law by 40\%.",

author = "Hoang, \{G. T.\} and C. Gil and E. Joffrin and D. Moreau and A. Becoulet and P. Bibet and Bizarro, \{J. P.\} and Budny, \{R. V.\} and J. Carrasco and Coulon, \{J. P.\} and \{De Michelis\}, C. and \{De Wit\}, \{T. Dudok\} and P. Monier-Garbet and M. Goniche and R. Guirlet and T. Hutter and Kaye, \{S. M.\} and J. Lasalle and L. Laurent and P. Lecoustey and X. Litaudon and M. Mattioli and Y. Peysson and Pecquet, \{A. L.\} and G. Rey and Sabbagh, \{S. A.\} and B. Saoutic and G. Tonon and Vallet, \{J. C.\}",

year = "1994",

doi = "10.1088/0029-5515/34/1/I05",

language = "English (US)",

volume = "34",

pages = "75--85",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "1",

}

Hoang, GT, Gil, C, Joffrin, E, Moreau, D, Becoulet, A, Bibet, P, Bizarro, JP, Budny, RV, Carrasco, J, Coulon, JP, De Michelis, C, De Wit, TD, Monier-Garbet, P, Goniche, M, Guirlet, R, Hutter, T, Kaye, SM, Lasalle, J, Laurent, L, Lecoustey, P, Litaudon, X, Mattioli, M, Peysson, Y, Pecquet, AL, Rey, G, Sabbagh, SA, Saoutic, B, Tonon, G & Vallet, JC 1994, 'Improved confinement in high l_i lower hybrid driven steady state plasmas in TORE SUPRA', Nuclear Fusion, vol. 34, no. 1, I05, pp. 75-85. https://doi.org/10.1088/0029-5515/34/1/I05

TY - JOUR

T1 - Improved confinement in high li lower hybrid driven steady state plasmas in TORE SUPRA

AU - Hoang, G. T.

AU - Gil, C.

AU - Joffrin, E.

AU - Moreau, D.

AU - Becoulet, A.

AU - Bibet, P.

AU - Bizarro, J. P.

AU - Budny, R. V.

AU - Carrasco, J.

AU - Coulon, J. P.

AU - De Michelis, C.

AU - De Wit, T. Dudok

AU - Monier-Garbet, P.

AU - Goniche, M.

AU - Guirlet, R.

AU - Hutter, T.

AU - Kaye, S. M.

AU - Lasalle, J.

AU - Laurent, L.

AU - Lecoustey, P.

AU - Litaudon, X.

AU - Mattioli, M.

AU - Peysson, Y.

AU - Pecquet, A. L.

AU - Rey, G.

AU - Sabbagh, S. A.

AU - Saoutic, B.

AU - Tonon, G.

AU - Vallet, J. C.

PY - 1994

Y1 - 1994

N2 - The global energy confinement of combined ohmic and lower hybrid driven TORE SUPRA plasmas has been analysed at various densities. In contradiction to the L mode ITER scaling law, this analysis indicates that the global energy confinement time depends strongly on the plasma density. Furthermore, the thermal electron energy content of steady state discharges is found to be in good agreement with the global Rebut-Lallia-Watkins (RLW) scaling law. Current ramp experiments show an enhancement of the global energy confinement with the internal inductance, li. These results have been extended to steady state regimes with lower hybrid current drive. Improved confinement has been obtained in a high li steady state plasma (li=1.7), where the modification of the current profile by lower hybrid waves leads to an increase in the central value of the safety factor (qψ(0) ≈ 2). In this case, the global confinement time is shown to exceed the value predicted by the RLW scaling law by 40%.

AB - The global energy confinement of combined ohmic and lower hybrid driven TORE SUPRA plasmas has been analysed at various densities. In contradiction to the L mode ITER scaling law, this analysis indicates that the global energy confinement time depends strongly on the plasma density. Furthermore, the thermal electron energy content of steady state discharges is found to be in good agreement with the global Rebut-Lallia-Watkins (RLW) scaling law. Current ramp experiments show an enhancement of the global energy confinement with the internal inductance, li. These results have been extended to steady state regimes with lower hybrid current drive. Improved confinement has been obtained in a high li steady state plasma (li=1.7), where the modification of the current profile by lower hybrid waves leads to an increase in the central value of the safety factor (qψ(0) ≈ 2). In this case, the global confinement time is shown to exceed the value predicted by the RLW scaling law by 40%.

UR - https://www.scopus.com/pages/publications/36149031561

UR - https://www.scopus.com/pages/publications/36149031561#tab=citedBy

U2 - 10.1088/0029-5515/34/1/I05

DO - 10.1088/0029-5515/34/1/I05

M3 - Article

AN - SCOPUS:36149031561

SN - 0029-5515

VL - 34

SP - 75

EP - 85

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 1

M1 - I05

ER -

Improved confinement in high l_i lower hybrid driven steady state plasmas in TORE SUPRA

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