Edge turbulence during ergodic divertor operation in Tore Supra

P. Devynck; X. Garbet; Ph Ghendrih; J. Gunn; C. Honore; B. Pégourié; G. Antar; A. Azeroual; P. Beyer; C. Boucher; V. Budaev; H. Capes; F. Gervais; P. Hennequin; T. Loarer; A. Quémeneur; A. Truc; J. C. Vallet

doi:10.1088/0029-5515/42/6/308

Edge turbulence during ergodic divertor operation in Tore Supra

P. Devynck
, X. Garbet
, Ph Ghendrih
, J. Gunn
, C. Honore
, B. Pégourié
, G. Antar
, A. Azeroual
, P. Beyer
, C. Boucher
, V. Budaev
, H. Capes
, F. Gervais
, P. Hennequin
, T. Loarer
, A. Quémeneur
, A. Truc
, J. C. Vallet

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

Abstract

We report new measurements of turbulence during ergodic divertor (ED) operation. At low density, some de-correlation of the turbulence is observed with a decrease of the long timescale structures. It is shown that the typical time involved is compatible with a de-correlation mechanism through radial separation of the B field lines by the ED, with an associated parallel length of the order of the distance between two modules of the ED. This observation reinforces the conclusion drawn in [1] and based on computer simulations. The situation changes when the density is increased: the turbulence level is found to increase. At the highest density, the structure of the turbulent signal is modified and the bursty behaviour suppressed by the ED at low density reappears. These observations lead to the conclusion that the turbulence measured at high density is not sensitive to the ED stabilization effect. This indicates that it could be carded by the ions.

Original language	English
Pages (from-to)	697-707
Number of pages	11
Journal	Nuclear Fusion
Volume	42
Issue number	6
DOIs	https://doi.org/10.1088/0029-5515/42/6/308
Publication status	Published - 1 Jun 2002

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Devynck, P., Garbet, X., Ghendrih, P., Gunn, J., Honore, C., Pégourié, B., Antar, G., Azeroual, A., Beyer, P., Boucher, C., Budaev, V., Capes, H., Gervais, F., Hennequin, P., Loarer, T., Quémeneur, A., Truc, A., & Vallet, J. C. (2002). Edge turbulence during ergodic divertor operation in Tore Supra. Nuclear Fusion, 42(6), 697-707. https://doi.org/10.1088/0029-5515/42/6/308

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title = "Edge turbulence during ergodic divertor operation in Tore Supra",

abstract = "We report new measurements of turbulence during ergodic divertor (ED) operation. At low density, some de-correlation of the turbulence is observed with a decrease of the long timescale structures. It is shown that the typical time involved is compatible with a de-correlation mechanism through radial separation of the B field lines by the ED, with an associated parallel length of the order of the distance between two modules of the ED. This observation reinforces the conclusion drawn in [1] and based on computer simulations. The situation changes when the density is increased: the turbulence level is found to increase. At the highest density, the structure of the turbulent signal is modified and the bursty behaviour suppressed by the ED at low density reappears. These observations lead to the conclusion that the turbulence measured at high density is not sensitive to the ED stabilization effect. This indicates that it could be carded by the ions.",

author = "P. Devynck and X. Garbet and Ph Ghendrih and J. Gunn and C. Honore and B. P{\'e}gouri{\'e} and G. Antar and A. Azeroual and P. Beyer and C. Boucher and V. Budaev and H. Capes and F. Gervais and P. Hennequin and T. Loarer and A. Qu{\'e}meneur and A. Truc and Vallet, \{J. C.\}",

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doi = "10.1088/0029-5515/42/6/308",

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Devynck, P, Garbet, X, Ghendrih, P, Gunn, J, Honore, C, Pégourié, B, Antar, G, Azeroual, A, Beyer, P, Boucher, C, Budaev, V, Capes, H, Gervais, F, Hennequin, P, Loarer, T, Quémeneur, A, Truc, A & Vallet, JC 2002, 'Edge turbulence during ergodic divertor operation in Tore Supra', Nuclear Fusion, vol. 42, no. 6, pp. 697-707. https://doi.org/10.1088/0029-5515/42/6/308

TY - JOUR

T1 - Edge turbulence during ergodic divertor operation in Tore Supra

AU - Devynck, P.

AU - Garbet, X.

AU - Ghendrih, Ph

AU - Gunn, J.

AU - Honore, C.

AU - Pégourié, B.

AU - Antar, G.

AU - Azeroual, A.

AU - Beyer, P.

AU - Boucher, C.

AU - Budaev, V.

AU - Capes, H.

AU - Gervais, F.

AU - Hennequin, P.

AU - Loarer, T.

AU - Quémeneur, A.

AU - Truc, A.

AU - Vallet, J. C.

PY - 2002/6/1

Y1 - 2002/6/1

N2 - We report new measurements of turbulence during ergodic divertor (ED) operation. At low density, some de-correlation of the turbulence is observed with a decrease of the long timescale structures. It is shown that the typical time involved is compatible with a de-correlation mechanism through radial separation of the B field lines by the ED, with an associated parallel length of the order of the distance between two modules of the ED. This observation reinforces the conclusion drawn in [1] and based on computer simulations. The situation changes when the density is increased: the turbulence level is found to increase. At the highest density, the structure of the turbulent signal is modified and the bursty behaviour suppressed by the ED at low density reappears. These observations lead to the conclusion that the turbulence measured at high density is not sensitive to the ED stabilization effect. This indicates that it could be carded by the ions.

AB - We report new measurements of turbulence during ergodic divertor (ED) operation. At low density, some de-correlation of the turbulence is observed with a decrease of the long timescale structures. It is shown that the typical time involved is compatible with a de-correlation mechanism through radial separation of the B field lines by the ED, with an associated parallel length of the order of the distance between two modules of the ED. This observation reinforces the conclusion drawn in [1] and based on computer simulations. The situation changes when the density is increased: the turbulence level is found to increase. At the highest density, the structure of the turbulent signal is modified and the bursty behaviour suppressed by the ED at low density reappears. These observations lead to the conclusion that the turbulence measured at high density is not sensitive to the ED stabilization effect. This indicates that it could be carded by the ions.

U2 - 10.1088/0029-5515/42/6/308

DO - 10.1088/0029-5515/42/6/308

M3 - Article

AN - SCOPUS:0036609773

SN - 0029-5515

VL - 42

SP - 697

EP - 707

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 6

ER -

Edge turbulence during ergodic divertor operation in Tore Supra

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