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

作者：Ekedahl A^*; Bucalossi J; Corre Y; Delchambre E; Dunand G; Meyer O; Mitteau R; Monier Garbet P; Pegourie B; Rimini F G; Saint Laurent F; Schwob J L; Tsitrone E

来源：Journal of Nuclear Materials, 2009, 390-91: 806-809.

DOI：10.1016/j.jnucmat.2009.01.213

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 (similar to cm(2)) hot spot on the main plasma facing component, the Toroidal Pumped Limiter (TPL), clearly localised in a Zone of thick carbon re-deposition (> 100 mu m). A MARFE (Multifaceted Asymmetric Radiation From the Edge) is often triggered, followed by disruption. Such hot spots have been observed in similar to 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.

• 出版日期2009-6-15
• 单位中国地震局