Analysis of radiative disruptions in RF-heated Tore Supra plasmas using infrared imaging

A. Ekedahl; J. Bucalossi; Y. Corre; E. Delchambre; G. Dunand; O. Meyer; R. Mitteau; P. Monier-Garbet; B. Pégourié; F. G. Rimini; F. Saint-Laurent; J. L. Schwob; E. Tsitrone

doi:10.1016/j.jnucmat.2009.01.213

Analysis of radiative disruptions in RF-heated Tore Supra plasmas using infrared imaging

A. Ekedahl^*
, J. Bucalossi
, Y. Corre
, E. Delchambre
, G. Dunand
, O. Meyer
, R. Mitteau
, P. Monier-Garbet
, B. Pégourié
, F. G. Rimini
, F. Saint-Laurent
, J. L. Schwob
, E. Tsitrone

^*Corresponding author for this work

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

26 Scopus citations

Abstract

The precursors and following sequential events leading to radiative disruptions in Tore Supra have been analysed using infrared imaging, together with visible and ultraviolet spectroscopy of impurity species. A common feature observed prior to the disruptions is the appearance of a small (∼cm²) hot spot on the main plasma facing component, the Toroidal Pumped Limiter (TPL), clearly localised in a zone of thick carbon re-deposition (>100 μm). A MARFE (Multifaceted Asymmetric Radiation From the Edge) is often triggered, followed by disruption. Such hot spots have been observed in ∼24% of the analysed disruptions, which is consistent with the fact that only 4/18 (22%) of the total area of the TPL is monitored with infrared cameras. These results suggest that over-heating of thick carbon re-deposition layers may play a role in the operational limits (MARFE, disruption) encountered.

Original language	English
Pages (from-to)	806-809
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	390-391
Issue number	1
DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.213
State	Published - 15 Jun 2009
Externally published	Yes

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10.1016/j.jnucmat.2009.01.213

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Ekedahl, A., Bucalossi, J., Corre, Y., Delchambre, E., Dunand, G., Meyer, O., Mitteau, R., Monier-Garbet, P., Pégourié, B., Rimini, F. G., Saint-Laurent, F., Schwob, J. L., & Tsitrone, E. (2009). Analysis of radiative disruptions in RF-heated Tore Supra plasmas using infrared imaging. Journal of Nuclear Materials, 390-391(1), 806-809. https://doi.org/10.1016/j.jnucmat.2009.01.213

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title = "Analysis of radiative disruptions in RF-heated Tore Supra plasmas using infrared imaging",

abstract = "The precursors and following sequential events leading to radiative disruptions in Tore Supra have been analysed using infrared imaging, together with visible and ultraviolet spectroscopy of impurity species. A common feature observed prior to the disruptions is the appearance of a small (∼cm2) hot spot on the main plasma facing component, the Toroidal Pumped Limiter (TPL), clearly localised in a zone of thick carbon re-deposition (>100 μm). A MARFE (Multifaceted Asymmetric Radiation From the Edge) is often triggered, followed by disruption. Such hot spots have been observed in ∼24\% of the analysed disruptions, which is consistent with the fact that only 4/18 (22\%) of the total area of the TPL is monitored with infrared cameras. These results suggest that over-heating of thick carbon re-deposition layers may play a role in the operational limits (MARFE, disruption) encountered.",

author = "A. Ekedahl and J. Bucalossi and Y. Corre and E. Delchambre and G. Dunand and O. Meyer and R. Mitteau and P. Monier-Garbet and B. P{\'e}gouri{\'e} and Rimini, \{F. G.\} and F. Saint-Laurent and Schwob, \{J. L.\} and E. Tsitrone",

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Ekedahl, A, Bucalossi, J, Corre, Y, Delchambre, E, Dunand, G, Meyer, O, Mitteau, R, Monier-Garbet, P, Pégourié, B, Rimini, FG, Saint-Laurent, F, Schwob, JL & Tsitrone, E 2009, 'Analysis of radiative disruptions in RF-heated Tore Supra plasmas using infrared imaging', Journal of Nuclear Materials, vol. 390-391, no. 1, pp. 806-809. https://doi.org/10.1016/j.jnucmat.2009.01.213

TY - JOUR

T1 - Analysis of radiative disruptions in RF-heated Tore Supra plasmas using infrared imaging

AU - Ekedahl, A.

AU - Bucalossi, J.

AU - Corre, Y.

AU - Delchambre, E.

AU - Dunand, G.

AU - Meyer, O.

AU - Mitteau, R.

AU - Monier-Garbet, P.

AU - Pégourié, B.

AU - Rimini, F. G.

AU - Saint-Laurent, F.

AU - Schwob, J. L.

AU - Tsitrone, E.

PY - 2009/6/15

Y1 - 2009/6/15

N2 - The precursors and following sequential events leading to radiative disruptions in Tore Supra have been analysed using infrared imaging, together with visible and ultraviolet spectroscopy of impurity species. A common feature observed prior to the disruptions is the appearance of a small (∼cm2) hot spot on the main plasma facing component, the Toroidal Pumped Limiter (TPL), clearly localised in a zone of thick carbon re-deposition (>100 μm). A MARFE (Multifaceted Asymmetric Radiation From the Edge) is often triggered, followed by disruption. Such hot spots have been observed in ∼24% of the analysed disruptions, which is consistent with the fact that only 4/18 (22%) of the total area of the TPL is monitored with infrared cameras. These results suggest that over-heating of thick carbon re-deposition layers may play a role in the operational limits (MARFE, disruption) encountered.

AB - The precursors and following sequential events leading to radiative disruptions in Tore Supra have been analysed using infrared imaging, together with visible and ultraviolet spectroscopy of impurity species. A common feature observed prior to the disruptions is the appearance of a small (∼cm2) hot spot on the main plasma facing component, the Toroidal Pumped Limiter (TPL), clearly localised in a zone of thick carbon re-deposition (>100 μm). A MARFE (Multifaceted Asymmetric Radiation From the Edge) is often triggered, followed by disruption. Such hot spots have been observed in ∼24% of the analysed disruptions, which is consistent with the fact that only 4/18 (22%) of the total area of the TPL is monitored with infrared cameras. These results suggest that over-heating of thick carbon re-deposition layers may play a role in the operational limits (MARFE, disruption) encountered.

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U2 - 10.1016/j.jnucmat.2009.01.213

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VL - 390-391

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EP - 809

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1

ER -

Analysis of radiative disruptions in RF-heated Tore Supra plasmas using infrared imaging

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