Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak à configuration variable (TCV)

O. Sauter, C. Angioni, S. Coda, P. Gomez, T. P. Goodman, M. A. Henderson, F. Hofmann, J. P. Hogge, J. M. Moret, P. Nikkola, Z. A. Pietrzyk, H. Weisen, S. Alberti, K. Appert, J. Bakos, R. Behn, P. Blanchard, P. Bosshard, R. Chavan, I. Condrea & 36 others A. Degeling, B. P. Duval, D. Fasel, J. Y. Favez, A. Favre, I. Furno, R. R. Kayruthdinov, P. Lavanchy, J. B. Lister, X. Llobet, V. E. Lukash, P. Gorgerat, P. F. Isoz, B. Joye, J. C. Magnin, A. Manini, B. Marlétaz, P. Marmillod, Y. R. Martin, An Martynov, J. M. Mayor, E. Minardi, J. Mlynar, P. J. Paris, A. Perez, Y. Peysson, V. Piffi, R. A. Pitts, A. Pochelon, H. Reimerdes, J. H. Rommers, E. Scavino, A. Sushkov, G. Tonetti, M. Q. Tran, A. Zabolotsky

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Fully noninductive, steady-state electron cyclotron current drive (ECCD) has been demonstrated for the first time in experiments carried out in the tokamak à configuration variable (TCV) [O. Sauter et al., Phys. Rev. Lett. 84, 3322 (2000)]. By appropriately distributing six 0.45 MW ECCD sources over the discharge cross section, fully noninductive, stable, and stationary plasmas with Ip up to 210 kA were obtained for the full discharge duration of 1.9 s, corresponding to more than 900 energy confinement times and more than 10 current redistribution times at an average current drive efficiency η20CD=0-01[1020 A.W-1 m-2]. These experiments have also demonstrated for the first time the steady recharging of the ohmic transformer using ECCD only. The effect of localized off-axis electron cyclotron heating (ECH) and EC current drive (ECCD) (co- and counter-) is investigated showing that locally driven currents amounting to only 1% of Ip significantly alter sawtooth periods and crash amplitudes. An improved quasi-stationary core confinement regime, with little or no sawtooth activity, has been obtained by a combination of off-axis ECH and on-axis CNTR-ECCD.

Original languageEnglish
Pages (from-to)2199-2207
Number of pages9
JournalPhysics of Plasmas
Volume8
Issue number5 II
DOIs
Publication statusPublished - May 2001

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cyclotrons
profiles
configurations
electrons
electron cyclotron heating
recharging
crashes
distributing
transformers
counters
cross sections

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak à configuration variable (TCV). / Sauter, O.; Angioni, C.; Coda, S.; Gomez, P.; Goodman, T. P.; Henderson, M. A.; Hofmann, F.; Hogge, J. P.; Moret, J. M.; Nikkola, P.; Pietrzyk, Z. A.; Weisen, H.; Alberti, S.; Appert, K.; Bakos, J.; Behn, R.; Blanchard, P.; Bosshard, P.; Chavan, R.; Condrea, I.; Degeling, A.; Duval, B. P.; Fasel, D.; Favez, J. Y.; Favre, A.; Furno, I.; Kayruthdinov, R. R.; Lavanchy, P.; Lister, J. B.; Llobet, X.; Lukash, V. E.; Gorgerat, P.; Isoz, P. F.; Joye, B.; Magnin, J. C.; Manini, A.; Marlétaz, B.; Marmillod, P.; Martin, Y. R.; Martynov, An; Mayor, J. M.; Minardi, E.; Mlynar, J.; Paris, P. J.; Perez, A.; Peysson, Y.; Piffi, V.; Pitts, R. A.; Pochelon, A.; Reimerdes, H.; Rommers, J. H.; Scavino, E.; Sushkov, A.; Tonetti, G.; Tran, M. Q.; Zabolotsky, A.

In: Physics of Plasmas, Vol. 8, No. 5 II, 05.2001, p. 2199-2207.

Research output: Contribution to journalArticle

Sauter, O, Angioni, C, Coda, S, Gomez, P, Goodman, TP, Henderson, MA, Hofmann, F, Hogge, JP, Moret, JM, Nikkola, P, Pietrzyk, ZA, Weisen, H, Alberti, S, Appert, K, Bakos, J, Behn, R, Blanchard, P, Bosshard, P, Chavan, R, Condrea, I, Degeling, A, Duval, BP, Fasel, D, Favez, JY, Favre, A, Furno, I, Kayruthdinov, RR, Lavanchy, P, Lister, JB, Llobet, X, Lukash, VE, Gorgerat, P, Isoz, PF, Joye, B, Magnin, JC, Manini, A, Marlétaz, B, Marmillod, P, Martin, YR, Martynov, A, Mayor, JM, Minardi, E, Mlynar, J, Paris, PJ, Perez, A, Peysson, Y, Piffi, V, Pitts, RA, Pochelon, A, Reimerdes, H, Rommers, JH, Scavino, E, Sushkov, A, Tonetti, G, Tran, MQ & Zabolotsky, A 2001, 'Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak à configuration variable (TCV)', Physics of Plasmas, vol. 8, no. 5 II, pp. 2199-2207. https://doi.org/10.1063/1.1355317
Sauter, O. ; Angioni, C. ; Coda, S. ; Gomez, P. ; Goodman, T. P. ; Henderson, M. A. ; Hofmann, F. ; Hogge, J. P. ; Moret, J. M. ; Nikkola, P. ; Pietrzyk, Z. A. ; Weisen, H. ; Alberti, S. ; Appert, K. ; Bakos, J. ; Behn, R. ; Blanchard, P. ; Bosshard, P. ; Chavan, R. ; Condrea, I. ; Degeling, A. ; Duval, B. P. ; Fasel, D. ; Favez, J. Y. ; Favre, A. ; Furno, I. ; Kayruthdinov, R. R. ; Lavanchy, P. ; Lister, J. B. ; Llobet, X. ; Lukash, V. E. ; Gorgerat, P. ; Isoz, P. F. ; Joye, B. ; Magnin, J. C. ; Manini, A. ; Marlétaz, B. ; Marmillod, P. ; Martin, Y. R. ; Martynov, An ; Mayor, J. M. ; Minardi, E. ; Mlynar, J. ; Paris, P. J. ; Perez, A. ; Peysson, Y. ; Piffi, V. ; Pitts, R. A. ; Pochelon, A. ; Reimerdes, H. ; Rommers, J. H. ; Scavino, E. ; Sushkov, A. ; Tonetti, G. ; Tran, M. Q. ; Zabolotsky, A. / Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak à configuration variable (TCV). In: Physics of Plasmas. 2001 ; Vol. 8, No. 5 II. pp. 2199-2207.
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title = "Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak {\`a} configuration variable (TCV)",
abstract = "Fully noninductive, steady-state electron cyclotron current drive (ECCD) has been demonstrated for the first time in experiments carried out in the tokamak {\`a} configuration variable (TCV) [O. Sauter et al., Phys. Rev. Lett. 84, 3322 (2000)]. By appropriately distributing six 0.45 MW ECCD sources over the discharge cross section, fully noninductive, stable, and stationary plasmas with Ip up to 210 kA were obtained for the full discharge duration of 1.9 s, corresponding to more than 900 energy confinement times and more than 10 current redistribution times at an average current drive efficiency η20CD=0-01[1020 A.W-1 m-2]. These experiments have also demonstrated for the first time the steady recharging of the ohmic transformer using ECCD only. The effect of localized off-axis electron cyclotron heating (ECH) and EC current drive (ECCD) (co- and counter-) is investigated showing that locally driven currents amounting to only 1{\%} of Ip significantly alter sawtooth periods and crash amplitudes. An improved quasi-stationary core confinement regime, with little or no sawtooth activity, has been obtained by a combination of off-axis ECH and on-axis CNTR-ECCD.",
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T1 - Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak à configuration variable (TCV)

AU - Sauter, O.

AU - Angioni, C.

AU - Coda, S.

AU - Gomez, P.

AU - Goodman, T. P.

AU - Henderson, M. A.

AU - Hofmann, F.

AU - Hogge, J. P.

AU - Moret, J. M.

AU - Nikkola, P.

AU - Pietrzyk, Z. A.

AU - Weisen, H.

AU - Alberti, S.

AU - Appert, K.

AU - Bakos, J.

AU - Behn, R.

AU - Blanchard, P.

AU - Bosshard, P.

AU - Chavan, R.

AU - Condrea, I.

AU - Degeling, A.

AU - Duval, B. P.

AU - Fasel, D.

AU - Favez, J. Y.

AU - Favre, A.

AU - Furno, I.

AU - Kayruthdinov, R. R.

AU - Lavanchy, P.

AU - Lister, J. B.

AU - Llobet, X.

AU - Lukash, V. E.

AU - Gorgerat, P.

AU - Isoz, P. F.

AU - Joye, B.

AU - Magnin, J. C.

AU - Manini, A.

AU - Marlétaz, B.

AU - Marmillod, P.

AU - Martin, Y. R.

AU - Martynov, An

AU - Mayor, J. M.

AU - Minardi, E.

AU - Mlynar, J.

AU - Paris, P. J.

AU - Perez, A.

AU - Peysson, Y.

AU - Piffi, V.

AU - Pitts, R. A.

AU - Pochelon, A.

AU - Reimerdes, H.

AU - Rommers, J. H.

AU - Scavino, E.

AU - Sushkov, A.

AU - Tonetti, G.

AU - Tran, M. Q.

AU - Zabolotsky, A.

PY - 2001/5

Y1 - 2001/5

N2 - Fully noninductive, steady-state electron cyclotron current drive (ECCD) has been demonstrated for the first time in experiments carried out in the tokamak à configuration variable (TCV) [O. Sauter et al., Phys. Rev. Lett. 84, 3322 (2000)]. By appropriately distributing six 0.45 MW ECCD sources over the discharge cross section, fully noninductive, stable, and stationary plasmas with Ip up to 210 kA were obtained for the full discharge duration of 1.9 s, corresponding to more than 900 energy confinement times and more than 10 current redistribution times at an average current drive efficiency η20CD=0-01[1020 A.W-1 m-2]. These experiments have also demonstrated for the first time the steady recharging of the ohmic transformer using ECCD only. The effect of localized off-axis electron cyclotron heating (ECH) and EC current drive (ECCD) (co- and counter-) is investigated showing that locally driven currents amounting to only 1% of Ip significantly alter sawtooth periods and crash amplitudes. An improved quasi-stationary core confinement regime, with little or no sawtooth activity, has been obtained by a combination of off-axis ECH and on-axis CNTR-ECCD.

AB - Fully noninductive, steady-state electron cyclotron current drive (ECCD) has been demonstrated for the first time in experiments carried out in the tokamak à configuration variable (TCV) [O. Sauter et al., Phys. Rev. Lett. 84, 3322 (2000)]. By appropriately distributing six 0.45 MW ECCD sources over the discharge cross section, fully noninductive, stable, and stationary plasmas with Ip up to 210 kA were obtained for the full discharge duration of 1.9 s, corresponding to more than 900 energy confinement times and more than 10 current redistribution times at an average current drive efficiency η20CD=0-01[1020 A.W-1 m-2]. These experiments have also demonstrated for the first time the steady recharging of the ohmic transformer using ECCD only. The effect of localized off-axis electron cyclotron heating (ECH) and EC current drive (ECCD) (co- and counter-) is investigated showing that locally driven currents amounting to only 1% of Ip significantly alter sawtooth periods and crash amplitudes. An improved quasi-stationary core confinement regime, with little or no sawtooth activity, has been obtained by a combination of off-axis ECH and on-axis CNTR-ECCD.

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U2 - 10.1063/1.1355317

DO - 10.1063/1.1355317

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