Understanding the spatial structure of RF-induced SOL modifications

L. Colas; A. Ekedahl; M. Goniche; J. P. Gunn; B. Nold; Y. Corre; V. Bobkov; R. Dux; F. Braun; J. M. Noterdaeme; M. L. Mayoral; K. Kirov; J. Mailloux; S. Heuraux; E. Faudot; J. Ongena

doi:10.1088/0741-3335/49/12B/S02

Understanding the spatial structure of RF-induced SOL modifications

L. Colas, A. Ekedahl, M. Goniche, J. P. Gunn, B. Nold, Y. Corre, V. Bobkov, R. Dux, F. Braun, J. M. Noterdaeme, M. L. Mayoral, K. Kirov, J. Mailloux, S. Heuraux, E. Faudot, J. Ongena

Laboratory for Plasma Physics

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Résumé

This paper summarizes recent experimental characterization of radio frequency (RF)-induced scrape-off layer (SOL) modifications in ASDEX-Upgrade (AUG), JET and Tore Supra (TS). Geometrical aspects are emphasized: complex SOL patterns are observed by several indicators visualized in one or two dimensions transverse to the magnetic field lines. Results are ascribed to inhomogeneous RF-induced SOL biasing around powered ion cyclotron range of frequencies antennas and associated E × B ₀ density convection (D'Ippolito et al 1993 Phys. Fluids B 5 3603). Within a simple RF sheath model (Perkins 1989 Nucl. Fusion 29 583), the shape of convective cells on TS can be interpreted in terms of RF-sheath generation by parallel RF currents. Some lessons are drawn for future machines.

langue originale	Anglais
Pages (de - à)	B35-B45
journal	Plasma Physics and Controlled Fusion
Volume	49
Numéro de publication	12 B
Les DOIs	https://doi.org/10.1088/0741-3335/49/12B/S02
état	Publié - 1 déc. 2007

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10.1088/0741-3335/49/12B/S02

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Colas, L., Ekedahl, A., Goniche, M., Gunn, J. P., Nold, B., Corre, Y., Bobkov, V., Dux, R., Braun, F., Noterdaeme, J. M., Mayoral, M. L., Kirov, K., Mailloux, J., Heuraux, S., Faudot, E., & Ongena, J. (2007). Understanding the spatial structure of RF-induced SOL modifications. Plasma Physics and Controlled Fusion, 49(12 B), B35-B45. https://doi.org/10.1088/0741-3335/49/12B/S02

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title = "Understanding the spatial structure of RF-induced SOL modifications",

abstract = "This paper summarizes recent experimental characterization of radio frequency (RF)-induced scrape-off layer (SOL) modifications in ASDEX-Upgrade (AUG), JET and Tore Supra (TS). Geometrical aspects are emphasized: complex SOL patterns are observed by several indicators visualized in one or two dimensions transverse to the magnetic field lines. Results are ascribed to inhomogeneous RF-induced SOL biasing around powered ion cyclotron range of frequencies antennas and associated E × B 0 density convection (D'Ippolito et al 1993 Phys. Fluids B 5 3603). Within a simple RF sheath model (Perkins 1989 Nucl. Fusion 29 583), the shape of convective cells on TS can be interpreted in terms of RF-sheath generation by parallel RF currents. Some lessons are drawn for future machines.",

author = "L. Colas and A. Ekedahl and M. Goniche and Gunn, {J. P.} and B. Nold and Y. Corre and V. Bobkov and R. Dux and F. Braun and Noterdaeme, {J. M.} and Mayoral, {M. L.} and K. Kirov and J. Mailloux and S. Heuraux and E. Faudot and J. Ongena",

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Colas, L, Ekedahl, A, Goniche, M, Gunn, JP, Nold, B, Corre, Y, Bobkov, V, Dux, R, Braun, F, Noterdaeme, JM, Mayoral, ML, Kirov, K, Mailloux, J, Heuraux, S, Faudot, E & Ongena, J 2007, 'Understanding the spatial structure of RF-induced SOL modifications', Plasma Physics and Controlled Fusion, VOL. 49, Numéro 12 B, p. B35-B45. https://doi.org/10.1088/0741-3335/49/12B/S02

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T1 - Understanding the spatial structure of RF-induced SOL modifications

AU - Colas, L.

AU - Ekedahl, A.

AU - Goniche, M.

AU - Gunn, J. P.

AU - Nold, B.

AU - Corre, Y.

AU - Bobkov, V.

AU - Dux, R.

AU - Braun, F.

AU - Noterdaeme, J. M.

AU - Mayoral, M. L.

AU - Kirov, K.

AU - Mailloux, J.

AU - Heuraux, S.

AU - Faudot, E.

AU - Ongena, J.

PY - 2007/12/1

Y1 - 2007/12/1

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AB - This paper summarizes recent experimental characterization of radio frequency (RF)-induced scrape-off layer (SOL) modifications in ASDEX-Upgrade (AUG), JET and Tore Supra (TS). Geometrical aspects are emphasized: complex SOL patterns are observed by several indicators visualized in one or two dimensions transverse to the magnetic field lines. Results are ascribed to inhomogeneous RF-induced SOL biasing around powered ion cyclotron range of frequencies antennas and associated E × B 0 density convection (D'Ippolito et al 1993 Phys. Fluids B 5 3603). Within a simple RF sheath model (Perkins 1989 Nucl. Fusion 29 583), the shape of convective cells on TS can be interpreted in terms of RF-sheath generation by parallel RF currents. Some lessons are drawn for future machines.

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Understanding the spatial structure of RF-induced SOL modifications

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