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

Commissariat à l'Énergie Atomique (CEA)
Max-Planck-Institut für Plasmaphysik
University of Ghent
Culham Centre for Fusion Energy
Institut Jean Lamour

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

61 Citations (Scopus)

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.

Original language	English
Pages (from-to)	B35-B45
Journal	Plasma Physics and Controlled Fusion
Volume	49
Issue number	12 B
DOIs	https://doi.org/10.1088/0741-3335/49/12B/S02
Publication status	Published - 1 Dec 2007

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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.",

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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.

UR - https://www.scopus.com/pages/publications/36349031687

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

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SN - 0741-3335

VL - 49

SP - B35-B45

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 12 B

ER -

Understanding the spatial structure of RF-induced SOL modifications

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