The 'hybrid' scenario in JET

Towards its validation for ITER

E. Joffrin, A.C.C. Sips, J.F. Artaud, A. Bécoulet, L. Bertalot, R. Budny, P. Buratti, P. Belo, C.D. Challis, F. Crisanti, M. De Baar, P. de Vries, C. Gormezano, C. Giroud, O. Gruber, G.T.A. Huysmans, F. Imbeaux, A. Isayama, X. Litaudon, P.J. Lomas & 8 others D.C. McDonald, Y.S. Na, S.D. Pinches, A. Staebler, Tuomas Tala, A. Tuccillo, K. D. Zastrow, JET-EFDA Contributors

Research output: Contribution to journalArticleScientificpeer-review

87 Citations (Scopus)

Abstract

In 2003, the performance of the 'hybrid' regime was successfully validated in JET experiments up to βN = 2.8 at low toroidal field (1.7 T), with plasma triangularity and normalized Larmor radius (ρ*) corresponding to identical ASDEX Upgrade discharges. Stationary conditions have been achieved with the fusion figure of merit (H89.βN/q295) reaching 0.42 at q95 = 3.9. The JET discharges show similar MHD, edge and current profile behaviour, when compared with the ASDEX Upgrade. In addition, the JET experiments have extended the hybrid scenario operation at higher toroidal field of 2.4 T and lower ρ* towards the projected ITER values. Using this database, transport and confinement properties are characterized with respect to the standard H-mode regime. Moreover, trace tritium has been injected to assess the diffusion and convective coefficients of the fusion fuel. The maximization of confinement and stability properties provides, to this scenario, a good probability of achieving a high fusion gain at reduced plasma current for durations of up to 2000 s in ITER.
Original languageEnglish
Pages (from-to)626 - 634
Number of pages9
JournalNuclear Fusion
Volume45
Issue number7
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

Fingerprint

fusion
Larmor radius
plasma currents
tritium
figure of merit
diffusion coefficient
transport properties
coefficients
profiles

Keywords

  • JET
  • plasma
  • fusion energy
  • fusion reactors
  • ITER
  • Tokamak

Cite this

Joffrin, E., Sips, A. C. C., Artaud, J. F., Bécoulet, A., Bertalot, L., Budny, R., ... JET-EFDA Contributors (2005). The 'hybrid' scenario in JET: Towards its validation for ITER. Nuclear Fusion, 45(7), 626 - 634. https://doi.org/10.1088/0029-5515/45/7/010
Joffrin, E. ; Sips, A.C.C. ; Artaud, J.F. ; Bécoulet, A. ; Bertalot, L. ; Budny, R. ; Buratti, P. ; Belo, P. ; Challis, C.D. ; Crisanti, F. ; De Baar, M. ; de Vries, P. ; Gormezano, C. ; Giroud, C. ; Gruber, O. ; Huysmans, G.T.A. ; Imbeaux, F. ; Isayama, A. ; Litaudon, X. ; Lomas, P.J. ; McDonald, D.C. ; Na, Y.S. ; Pinches, S.D. ; Staebler, A. ; Tala, Tuomas ; Tuccillo, A. ; Zastrow, K. D. ; JET-EFDA Contributors. / The 'hybrid' scenario in JET : Towards its validation for ITER. In: Nuclear Fusion. 2005 ; Vol. 45, No. 7. pp. 626 - 634.
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abstract = "In 2003, the performance of the 'hybrid' regime was successfully validated in JET experiments up to βN = 2.8 at low toroidal field (1.7 T), with plasma triangularity and normalized Larmor radius (ρ*) corresponding to identical ASDEX Upgrade discharges. Stationary conditions have been achieved with the fusion figure of merit (H89.βN/q295) reaching 0.42 at q95 = 3.9. The JET discharges show similar MHD, edge and current profile behaviour, when compared with the ASDEX Upgrade. In addition, the JET experiments have extended the hybrid scenario operation at higher toroidal field of 2.4 T and lower ρ* towards the projected ITER values. Using this database, transport and confinement properties are characterized with respect to the standard H-mode regime. Moreover, trace tritium has been injected to assess the diffusion and convective coefficients of the fusion fuel. The maximization of confinement and stability properties provides, to this scenario, a good probability of achieving a high fusion gain at reduced plasma current for durations of up to 2000 s in ITER.",
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Joffrin, E, Sips, ACC, Artaud, JF, Bécoulet, A, Bertalot, L, Budny, R, Buratti, P, Belo, P, Challis, CD, Crisanti, F, De Baar, M, de Vries, P, Gormezano, C, Giroud, C, Gruber, O, Huysmans, GTA, Imbeaux, F, Isayama, A, Litaudon, X, Lomas, PJ, McDonald, DC, Na, YS, Pinches, SD, Staebler, A, Tala, T, Tuccillo, A, Zastrow, KD & JET-EFDA Contributors 2005, 'The 'hybrid' scenario in JET: Towards its validation for ITER', Nuclear Fusion, vol. 45, no. 7, pp. 626 - 634. https://doi.org/10.1088/0029-5515/45/7/010

The 'hybrid' scenario in JET : Towards its validation for ITER. / Joffrin, E.; Sips, A.C.C.; Artaud, J.F.; Bécoulet, A.; Bertalot, L.; Budny, R.; Buratti, P.; Belo, P.; Challis, C.D.; Crisanti, F.; De Baar, M.; de Vries, P.; Gormezano, C.; Giroud, C.; Gruber, O.; Huysmans, G.T.A.; Imbeaux, F.; Isayama, A.; Litaudon, X.; Lomas, P.J.; McDonald, D.C.; Na, Y.S.; Pinches, S.D.; Staebler, A.; Tala, Tuomas; Tuccillo, A.; Zastrow, K. D.; JET-EFDA Contributors.

In: Nuclear Fusion, Vol. 45, No. 7, 2005, p. 626 - 634.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The 'hybrid' scenario in JET

T2 - Towards its validation for ITER

AU - Joffrin, E.

AU - Sips, A.C.C.

AU - Artaud, J.F.

AU - Bécoulet, A.

AU - Bertalot, L.

AU - Budny, R.

AU - Buratti, P.

AU - Belo, P.

AU - Challis, C.D.

AU - Crisanti, F.

AU - De Baar, M.

AU - de Vries, P.

AU - Gormezano, C.

AU - Giroud, C.

AU - Gruber, O.

AU - Huysmans, G.T.A.

AU - Imbeaux, F.

AU - Isayama, A.

AU - Litaudon, X.

AU - Lomas, P.J.

AU - McDonald, D.C.

AU - Na, Y.S.

AU - Pinches, S.D.

AU - Staebler, A.

AU - Tala, Tuomas

AU - Tuccillo, A.

AU - Zastrow, K. D.

AU - JET-EFDA Contributors,

PY - 2005

Y1 - 2005

N2 - In 2003, the performance of the 'hybrid' regime was successfully validated in JET experiments up to βN = 2.8 at low toroidal field (1.7 T), with plasma triangularity and normalized Larmor radius (ρ*) corresponding to identical ASDEX Upgrade discharges. Stationary conditions have been achieved with the fusion figure of merit (H89.βN/q295) reaching 0.42 at q95 = 3.9. The JET discharges show similar MHD, edge and current profile behaviour, when compared with the ASDEX Upgrade. In addition, the JET experiments have extended the hybrid scenario operation at higher toroidal field of 2.4 T and lower ρ* towards the projected ITER values. Using this database, transport and confinement properties are characterized with respect to the standard H-mode regime. Moreover, trace tritium has been injected to assess the diffusion and convective coefficients of the fusion fuel. The maximization of confinement and stability properties provides, to this scenario, a good probability of achieving a high fusion gain at reduced plasma current for durations of up to 2000 s in ITER.

AB - In 2003, the performance of the 'hybrid' regime was successfully validated in JET experiments up to βN = 2.8 at low toroidal field (1.7 T), with plasma triangularity and normalized Larmor radius (ρ*) corresponding to identical ASDEX Upgrade discharges. Stationary conditions have been achieved with the fusion figure of merit (H89.βN/q295) reaching 0.42 at q95 = 3.9. The JET discharges show similar MHD, edge and current profile behaviour, when compared with the ASDEX Upgrade. In addition, the JET experiments have extended the hybrid scenario operation at higher toroidal field of 2.4 T and lower ρ* towards the projected ITER values. Using this database, transport and confinement properties are characterized with respect to the standard H-mode regime. Moreover, trace tritium has been injected to assess the diffusion and convective coefficients of the fusion fuel. The maximization of confinement and stability properties provides, to this scenario, a good probability of achieving a high fusion gain at reduced plasma current for durations of up to 2000 s in ITER.

KW - JET

KW - plasma

KW - fusion energy

KW - fusion reactors

KW - ITER

KW - Tokamak

U2 - 10.1088/0029-5515/45/7/010

DO - 10.1088/0029-5515/45/7/010

M3 - Article

VL - 45

SP - 626

EP - 634

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 7

ER -

Joffrin E, Sips ACC, Artaud JF, Bécoulet A, Bertalot L, Budny R et al. The 'hybrid' scenario in JET: Towards its validation for ITER. Nuclear Fusion. 2005;45(7):626 - 634. https://doi.org/10.1088/0029-5515/45/7/010