Progress towards steady-state operation and real-time control of internal transport barriers in JET

X. Litaudon; A. Bécoulet; F. Crisanti; R. C. Wolf; Yu F. Baranov; E. Barbato; M. Bécoulet; R. Budny; C. Castaldo; R. Cesario; C. D. Challis; G. D. Conway; M. R. De Baar; P. De Vries; R. Dux; L. G. Eriksson; B. Esposito; R. Felton; C. Fourment; D. Frigione; X. Garbet; R. Giannella; C. Giroud; G. Gorini; N. C. Hawkes; T. Hellsten; T. C. Hender; P. Hennequin; G. M.D. Hogeweij; G. T.A. Huysmans; F. Imbeaux; E. Joffrin; P. J. Lomas; Ph Lotte; P. Maget; J. Mailloux; P. Mantica; M. J. Mantsinen; D. Mazon; D. Moreau; V. Parail; V. Pericoli; E. Rachlew; M. Riva; F. Rimini; Y. Sarazin; B. C. Stratton; T. J.J. Tala; G. Tresset; O. Tudisco; L. Zabeo; K. D. Zastrow; JET-EFDA Contributors

doi:10.1088/0029-5515/43/7/309

Progress towards steady-state operation and real-time control of internal transport barriers in JET

X. Litaudon^*, A. Bécoulet, F. Crisanti, R. C. Wolf, Yu F. Baranov, E. Barbato, M. Bécoulet, R. Budny, C. Castaldo, R. Cesario, C. D. Challis, G. D. Conway, M. R. De Baar, P. De Vries, R. Dux, L. G. Eriksson, B. Esposito, R. Felton, C. Fourment, D. FrigioneX. Garbet, R. Giannella, C. Giroud, G. Gorini, N. C. Hawkes, T. Hellsten, T. C. Hender, P. Hennequin, G. M.D. Hogeweij, G. T.A. Huysmans, F. Imbeaux, E. Joffrin, P. J. Lomas, Ph Lotte, P. Maget, J. Mailloux, P. Mantica, M. J. Mantsinen, D. Mazon, D. Moreau, V. Parail, V. Pericoli, E. Rachlew, M. Riva, F. Rimini, Y. Sarazin, B. C. Stratton, T. J.J. Tala, G. Tresset, O. Tudisco, L. Zabeo, K. D. Zastrow, JET-EFDA Contributors

^*Corresponding author for this work

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

67 Citations (Scopus)

Abstract

In JET, advanced tokamak research mainly focuses on plasmas with internal transport barriers (ITBs) that are strongly influenced by the current density profile. A previously developed optimized shear regime with low magnetic shear in the plasma centre has been extended to deeply negative magnetic shear configurations. High fusion performance with wide ITBs has been obtained transiently with negative central magnetic shear configuration: H_IPB98(y,2) ∼ 1.9, β_N = 2.4 at I_P = 2.5 MA. At somewhat reduced performance, electron and ion ITBs have been sustained in full current drive operation with 1 MA of bootstrap current: H_IPB98(y,2) ∼ 1, β_N = 1.7 at I_p = 2.0 MA. The ITBs were maintained for up to 11 s for the latter case. This duration, much larger than the energy confinement time (37 times larger), is already approaching a current resistive time. New real-time measurements and feedback control algorithms have been developed and implemented in JET for successfully controlling the ITB dynamics and the current density profile in the highly non-inductive current regime.

Original language	English
Pages (from-to)	565-572
Number of pages	8
Journal	Nuclear Fusion
Volume	43
Issue number	7
DOIs	https://doi.org/10.1088/0029-5515/43/7/309
Publication status	Published - 1 Jul 2003
MoE publication type	A1 Journal article-refereed

Keywords

JET
real-time control

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1088/0029-5515/43/7/309

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Litaudon, X., Bécoulet, A., Crisanti, F., Wolf, R. C., Baranov, Y. F., Barbato, E., Bécoulet, M., Budny, R., Castaldo, C., Cesario, R., Challis, C. D., Conway, G. D., De Baar, M. R., De Vries, P., Dux, R., Eriksson, L. G., Esposito, B., Felton, R., Fourment, C., ... JET-EFDA Contributors (2003). Progress towards steady-state operation and real-time control of internal transport barriers in JET. Nuclear Fusion, 43(7), 565-572. https://doi.org/10.1088/0029-5515/43/7/309

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title = "Progress towards steady-state operation and real-time control of internal transport barriers in JET",

abstract = "In JET, advanced tokamak research mainly focuses on plasmas with internal transport barriers (ITBs) that are strongly influenced by the current density profile. A previously developed optimized shear regime with low magnetic shear in the plasma centre has been extended to deeply negative magnetic shear configurations. High fusion performance with wide ITBs has been obtained transiently with negative central magnetic shear configuration: HIPB98(y,2) ∼ 1.9, βN = 2.4 at IP = 2.5 MA. At somewhat reduced performance, electron and ion ITBs have been sustained in full current drive operation with 1 MA of bootstrap current: HIPB98(y,2) ∼ 1, βN = 1.7 at Ip = 2.0 MA. The ITBs were maintained for up to 11 s for the latter case. This duration, much larger than the energy confinement time (37 times larger), is already approaching a current resistive time. New real-time measurements and feedback control algorithms have been developed and implemented in JET for successfully controlling the ITB dynamics and the current density profile in the highly non-inductive current regime.",

keywords = "JET, real-time control",

author = "X. Litaudon and A. B{\'e}coulet and F. Crisanti and Wolf, {R. C.} and Baranov, {Yu F.} and E. Barbato and M. B{\'e}coulet and R. Budny and C. Castaldo and R. Cesario and Challis, {C. D.} and Conway, {G. D.} and {De Baar}, {M. R.} and {De Vries}, P. and R. Dux and Eriksson, {L. G.} and B. Esposito and R. Felton and C. Fourment and D. Frigione and X. Garbet and R. Giannella and C. Giroud and G. Gorini and Hawkes, {N. C.} and T. Hellsten and Hender, {T. C.} and P. Hennequin and Hogeweij, {G. M.D.} and Huysmans, {G. T.A.} and F. Imbeaux and E. Joffrin and Lomas, {P. J.} and Ph Lotte and P. Maget and J. Mailloux and P. Mantica and Mantsinen, {M. J.} and D. Mazon and D. Moreau and V. Parail and V. Pericoli and E. Rachlew and M. Riva and F. Rimini and Y. Sarazin and Stratton, {B. C.} and Tala, {T. J.J.} and G. Tresset and O. Tudisco and L. Zabeo and Zastrow, {K. D.} and {JET-EFDA Contributors}",

year = "2003",

month = jul,

day = "1",

doi = "10.1088/0029-5515/43/7/309",

language = "English",

volume = "43",

pages = "565--572",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "Institute of Physics IOP",

number = "7",

}

Litaudon, X, Bécoulet, A, Crisanti, F, Wolf, RC, Baranov, YF, Barbato, E, Bécoulet, M, Budny, R, Castaldo, C, Cesario, R, Challis, CD, Conway, GD, De Baar, MR, De Vries, P, Dux, R, Eriksson, LG, Esposito, B, Felton, R, Fourment, C, Frigione, D, Garbet, X, Giannella, R, Giroud, C, Gorini, G, Hawkes, NC, Hellsten, T, Hender, TC, Hennequin, P, Hogeweij, GMD, Huysmans, GTA, Imbeaux, F, Joffrin, E, Lomas, PJ, Lotte, P, Maget, P, Mailloux, J, Mantica, P, Mantsinen, MJ, Mazon, D, Moreau, D, Parail, V, Pericoli, V, Rachlew, E, Riva, M, Rimini, F, Sarazin, Y, Stratton, BC, Tala, TJJ, Tresset, G, Tudisco, O, Zabeo, L, Zastrow, KD & JET-EFDA Contributors 2003, 'Progress towards steady-state operation and real-time control of internal transport barriers in JET', Nuclear Fusion, vol. 43, no. 7, pp. 565-572. https://doi.org/10.1088/0029-5515/43/7/309

TY - JOUR

T1 - Progress towards steady-state operation and real-time control of internal transport barriers in JET

AU - Litaudon, X.

AU - Bécoulet, A.

AU - Crisanti, F.

AU - Wolf, R. C.

AU - Baranov, Yu F.

AU - Barbato, E.

AU - Bécoulet, M.

AU - Budny, R.

AU - Castaldo, C.

AU - Cesario, R.

AU - Challis, C. D.

AU - Conway, G. D.

AU - De Baar, M. R.

AU - De Vries, P.

AU - Dux, R.

AU - Eriksson, L. G.

AU - Esposito, B.

AU - Felton, R.

AU - Fourment, C.

AU - Frigione, D.

AU - Garbet, X.

AU - Giannella, R.

AU - Giroud, C.

AU - Gorini, G.

AU - Hawkes, N. C.

AU - Hellsten, T.

AU - Hender, T. C.

AU - Hennequin, P.

AU - Hogeweij, G. M.D.

AU - Huysmans, G. T.A.

AU - Imbeaux, F.

AU - Joffrin, E.

AU - Lomas, P. J.

AU - Lotte, Ph

AU - Maget, P.

AU - Mailloux, J.

AU - Mantica, P.

AU - Mantsinen, M. J.

AU - Mazon, D.

AU - Moreau, D.

AU - Parail, V.

AU - Pericoli, V.

AU - Rachlew, E.

AU - Riva, M.

AU - Rimini, F.

AU - Sarazin, Y.

AU - Stratton, B. C.

AU - Tala, T. J.J.

AU - Tresset, G.

AU - Tudisco, O.

AU - Zabeo, L.

AU - Zastrow, K. D.

AU - JET-EFDA Contributors,

PY - 2003/7/1

Y1 - 2003/7/1

N2 - In JET, advanced tokamak research mainly focuses on plasmas with internal transport barriers (ITBs) that are strongly influenced by the current density profile. A previously developed optimized shear regime with low magnetic shear in the plasma centre has been extended to deeply negative magnetic shear configurations. High fusion performance with wide ITBs has been obtained transiently with negative central magnetic shear configuration: HIPB98(y,2) ∼ 1.9, βN = 2.4 at IP = 2.5 MA. At somewhat reduced performance, electron and ion ITBs have been sustained in full current drive operation with 1 MA of bootstrap current: HIPB98(y,2) ∼ 1, βN = 1.7 at Ip = 2.0 MA. The ITBs were maintained for up to 11 s for the latter case. This duration, much larger than the energy confinement time (37 times larger), is already approaching a current resistive time. New real-time measurements and feedback control algorithms have been developed and implemented in JET for successfully controlling the ITB dynamics and the current density profile in the highly non-inductive current regime.

AB - In JET, advanced tokamak research mainly focuses on plasmas with internal transport barriers (ITBs) that are strongly influenced by the current density profile. A previously developed optimized shear regime with low magnetic shear in the plasma centre has been extended to deeply negative magnetic shear configurations. High fusion performance with wide ITBs has been obtained transiently with negative central magnetic shear configuration: HIPB98(y,2) ∼ 1.9, βN = 2.4 at IP = 2.5 MA. At somewhat reduced performance, electron and ion ITBs have been sustained in full current drive operation with 1 MA of bootstrap current: HIPB98(y,2) ∼ 1, βN = 1.7 at Ip = 2.0 MA. The ITBs were maintained for up to 11 s for the latter case. This duration, much larger than the energy confinement time (37 times larger), is already approaching a current resistive time. New real-time measurements and feedback control algorithms have been developed and implemented in JET for successfully controlling the ITB dynamics and the current density profile in the highly non-inductive current regime.

KW - JET

KW - real-time control

UR - http://www.scopus.com/inward/record.url?scp=0042343770&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/43/7/309

DO - 10.1088/0029-5515/43/7/309

M3 - Article

AN - SCOPUS:0042343770

SN - 0029-5515

VL - 43

SP - 565

EP - 572

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 7

ER -

Progress towards steady-state operation and real-time control of internal transport barriers in JET

Abstract

Keywords

UN SDGs

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